2 Advanced Linux Sound Architecture - Driver
3 ==========================================
10 To enable ALSA support you need at least to build the kernel with
11 primary sound card support (CONFIG_SOUND). Since ALSA can emulate OSS,
12 you don't have to choose any of the OSS modules.
14 Enable "OSS API emulation" (CONFIG_SND_OSSEMUL) and both OSS mixer and
15 PCM supports if you want to run OSS applications with ALSA.
17 If you want to support the WaveTable functionality on cards such as
18 SB Live! then you need to enable "Sequencer support"
19 (CONFIG_SND_SEQUENCER).
21 To make ALSA debug messages more verbose, enable the "Verbose printk"
22 and "Debug" options. To check for memory leaks, turn on "Debug memory"
23 too. "Debug detection" will add checks for the detection of cards.
25 Please note that all the ALSA ISA drivers support the Linux isapnp API
26 (if the card supports ISA PnP). You don't need to configure the cards
33 This depends on your distribution, but normally you use the /dev/MAKEDEV
34 script to create the necessary device nodes. On some systems you use a
35 script named 'snddevices'.
41 The user can load modules with options. If the module supports more than
42 one card and you have more than one card of the same type then you can
43 specify multiple values for the option separated by commas.
45 Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
50 The core ALSA module. It is used by all ALSA card drivers.
51 It takes the following options which have global effects.
53 major - major number for sound driver
56 - limiting card index for auto-loading (1-8)
58 - For auto-loading more than one card, specify this
59 option together with snd-card-X aliases.
60 slots - Reserve the slot index for the given driver.
61 This option takes multiple strings.
62 See "Module Autoloading Support" section for details.
63 debug - Specifies the debug message level
64 (0 = disable debug prints, 1 = normal debug messages,
65 2 = verbose debug messages)
66 This option appears only when CONFIG_SND_DEBUG=y.
67 This option can be dynamically changed via sysfs
68 /sys/modules/snd/parameters/debug file.
73 The PCM OSS emulation module.
74 This module takes options which change the mapping of devices.
76 dsp_map - PCM device number maps assigned to the 1st OSS device.
78 adsp_map - PCM device number maps assigned to the 2st OSS device.
81 - Don't block opening busy PCM devices. Default: 1
83 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
84 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
85 to PCM #0 of the card #0.
86 For changing the second or later card, specify the option with
87 commas, such like "dsp_map=0,1".
89 nonblock_open option is used to change the behavior of the PCM
90 regarding opening the device. When this option is non-zero,
91 opening a busy OSS PCM device won't be blocked but return
92 immediately with EAGAIN (just like O_NONBLOCK flag).
97 This module takes options which change the mapping of devices.
98 similar to those of the snd-pcm-oss module.
100 midi_map - MIDI device number maps assigned to the 1st OSS device.
102 amidi_map - MIDI device number maps assigned to the 2st OSS device.
105 Common parameters for top sound card modules
106 --------------------------------------------
108 Each of top level sound card module takes the following options.
110 index - index (slot #) of sound card
111 - Values: 0 through 31 or negative
112 - If nonnegative, assign that index number
113 - if negative, interpret as a bitmask of permissible
114 indices; the first free permitted index is assigned
116 id - card ID (identifier or name)
117 - Can be up to 15 characters long
118 - Default: the card type
119 - A directory by this name is created under /proc/asound/
120 containing information about the card
121 - This ID can be used instead of the index number in
124 - Default: enabled, for PCI and ISA PnP cards
129 Module for AdLib FM cards.
131 port - port # for OPL chip
133 This module supports multiple cards. It does not support autoprobe, so
134 the port must be specified. For actual AdLib FM cards it will be 0x388.
135 Note that this card does not have PCM support and no mixer; only FM
138 Make sure you have "sbiload" from the alsa-tools package available and,
139 after loading the module, find out the assigned ALSA sequencer port
140 number through "sbiload -l". Example output:
142 Port Client name Port name
143 64:0 OPL2 FM synth OPL2 FM Port
145 Load the std.sb and drums.sb patches also supplied by sbiload:
147 sbiload -p 64:0 std.sb drums.sb
149 If you use this driver to drive an OPL3, you can use std.o3 and drums.o3
150 instead. To have the card produce sound, use aplaymidi from alsa-utils:
152 aplaymidi -p 64:0 foo.mid
157 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
159 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
161 This module supports multiple cards, autoprobe and PnP.
166 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
168 port - port # for AD1848 chip
169 irq - IRQ # for AD1848 chip
170 dma1 - DMA # for AD1848 chip (0,1,3)
172 This module supports multiple cards. It does not support autoprobe
173 thus main port must be specified!!! Other ports are optional.
175 The power-management is supported.
180 Module for Analog Devices AD1889 chips.
182 ac97_quirk - AC'97 workaround for strange hardware
183 See the description of intel8x0 module for details.
185 This module supports multiple cards.
190 Module for ALi M5451 PCI chip.
192 pcm_channels - Number of hardware channels assigned for PCM
193 spdif - Support SPDIF I/O
196 This module supports one chip and autoprobe.
198 The power-management is supported.
203 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
205 This module supports multiple cards, autoprobe and PnP.
207 The power-management is supported.
212 Module for Avance Logic ALS300 and ALS300+
214 This module supports multiple cards.
216 The power-management is supported.
221 Module for sound cards based on Avance Logic ALS4000 PCI chip.
223 joystick_port - port # for legacy joystick support.
224 0 = disabled (default), 1 = auto-detect
226 This module supports multiple cards, autoprobe and PnP.
228 The power-management is supported.
233 Module for AudioScience ASI soundcards
235 enable_hpi_hwdep - enable HPI hwdep for AudioScience soundcard
237 This module supports multiple cards.
238 The driver requires the firmware loader support on kernel.
243 Module for ATI IXP 150/200/250/400 AC97 controllers.
245 ac97_clock - AC'97 clock (default = 48000)
246 ac97_quirk - AC'97 workaround for strange hardware
247 See "AC97 Quirk Option" section below.
248 ac97_codec - Workaround to specify which AC'97 codec
249 instead of probing. If this works for you
250 file a bug with your `lspci -vn` output.
252 -1 -- Default behavior.
253 0-2 -- Use the specified codec.
254 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
256 This module supports one card and autoprobe.
258 ATI IXP has two different methods to control SPDIF output. One is
259 over AC-link and another is over the "direct" SPDIF output. The
260 implementation depends on the motherboard, and you'll need to
261 choose the correct one via spdif_aclink module option.
263 The power-management is supported.
265 Module snd-atiixp-modem
266 -----------------------
268 Module for ATI IXP 150/200/250 AC97 modem controllers.
270 This module supports one card and autoprobe.
272 Note: The default index value of this module is -2, i.e. the first
275 The power-management is supported.
277 Module snd-au8810, snd-au8820, snd-au8830
278 -----------------------------------------
280 Module for Aureal Vortex, Vortex2 and Advantage device.
282 pcifix - Control PCI workarounds
283 0 = Disable all workarounds
284 1 = Force the PCI latency of the Aureal card to 0xff
285 2 = Force the Extend PCI#2 Internal Master for Efficient
286 Handling of Dummy Requests on the VIA KT133 AGP Bridge
287 3 = Force both settings
288 255 = Autodetect what is required (default)
290 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
291 EQ, mpu401, gameport. A3D and wavetable support are still in development.
292 Development and reverse engineering work is being coordinated at
293 http://savannah.nongnu.org/projects/openvortex/
294 SPDIF output has a copy of the AC97 codec output, unless you use the
295 "spdif" pcm device, which allows raw data passthru.
296 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
299 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
300 control correctly. If you have problems regarding this, try
301 another ALSA compliant mixer (alsamixer works).
306 Module for Aztech Sound Galaxy soundcards based on the Aztech AZT1605
309 port - port # for BASE (0x220,0x240,0x260,0x280)
310 wss_port - port # for WSS (0x530,0x604,0xe80,0xf40)
311 irq - IRQ # for WSS (7,9,10,11)
312 dma1 - DMA # for WSS playback (0,1,3)
313 dma2 - DMA # for WSS capture (0,1), -1 = disabled (default)
314 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disabled (default)
315 mpu_irq - IRQ # for MPU-401 UART (3,5,7,9), -1 = disabled (default)
316 fm_port - port # for OPL3 (0x388), -1 = disabled (default)
318 This module supports multiple cards. It does not support autoprobe: port,
319 wss_port, irq and dma1 have to be specified. The other values are
322 "port" needs to match the BASE ADDRESS jumper on the card (0x220 or 0x240)
323 or the value stored in the card's EEPROM for cards that have an EEPROM and
324 their "CONFIG MODE" jumper set to "EEPROM SETTING". The other values can
325 be chosen freely from the options enumerated above.
327 If dma2 is specified and different from dma1, the card will operate in
328 full-duplex mode. When dma1=3, only dma2=0 is valid and the only way to
329 enable capture since only channels 0 and 1 are available for capture.
331 Generic settings are "port=0x220 wss_port=0x530 irq=10 dma1=1 dma2=0
332 mpu_port=0x330 mpu_irq=9 fm_port=0x388".
334 Whatever IRQ and DMA channels you pick, be sure to reserve them for
335 legacy ISA in your BIOS.
340 Module for Aztech Sound Galaxy soundcards based on the Aztech AZT2316
343 port - port # for BASE (0x220,0x240,0x260,0x280)
344 wss_port - port # for WSS (0x530,0x604,0xe80,0xf40)
345 irq - IRQ # for WSS (7,9,10,11)
346 dma1 - DMA # for WSS playback (0,1,3)
347 dma2 - DMA # for WSS capture (0,1), -1 = disabled (default)
348 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disabled (default)
349 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10), -1 = disabled (default)
350 fm_port - port # for OPL3 (0x388), -1 = disabled (default)
352 This module supports multiple cards. It does not support autoprobe: port,
353 wss_port, irq and dma1 have to be specified. The other values are
356 "port" needs to match the BASE ADDRESS jumper on the card (0x220 or 0x240)
357 or the value stored in the card's EEPROM for cards that have an EEPROM and
358 their "CONFIG MODE" jumper set to "EEPROM SETTING". The other values can
359 be chosen freely from the options enumerated above.
361 If dma2 is specified and different from dma1, the card will operate in
362 full-duplex mode. When dma1=3, only dma2=0 is valid and the only way to
363 enable capture since only channels 0 and 1 are available for capture.
365 Generic settings are "port=0x220 wss_port=0x530 irq=10 dma1=1 dma2=0
366 mpu_port=0x330 mpu_irq=9 fm_port=0x388".
368 Whatever IRQ and DMA channels you pick, be sure to reserve them for
369 legacy ISA in your BIOS.
374 Module for Audiowerk2 sound card
376 This module supports multiple cards.
381 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
383 This module supports multiple cards, PnP and autoprobe.
385 The power-management is supported.
390 Module for sound cards based on Aztech AZF3328 PCI chip.
392 joystick - Enable joystick (default off)
394 This module supports multiple cards.
399 Module for video cards based on Bt87x chips.
401 digital_rate - Override the default digital rate (Hz)
402 load_all - Load the driver even if the card model isn't known
404 This module supports multiple cards.
406 Note: The default index value of this module is -2, i.e. the first
412 Module for Creative Audigy LS and SB Live 24bit
414 This module supports multiple cards.
420 Module for sound cards based on C-Media CMI8330 ISA chips.
422 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
424 with isapnp=0, the following options are available:
426 wssport - port # for CMI8330 chip (WSS)
427 wssirq - IRQ # for CMI8330 chip (WSS)
428 wssdma - first DMA # for CMI8330 chip (WSS)
429 sbport - port # for CMI8330 chip (SB16)
430 sbirq - IRQ # for CMI8330 chip (SB16)
431 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
432 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
433 fmport - (optional) OPL3 I/O port
434 mpuport - (optional) MPU401 I/O port
435 mpuirq - (optional) MPU401 irq #
437 This module supports multiple cards and autoprobe.
439 The power-management is supported.
444 Module for C-Media CMI8338/8738/8768/8770 PCI sound cards.
446 mpu_port - port address of MIDI interface (8338 only):
447 0x300,0x310,0x320,0x330 = legacy port,
448 0 = disable (default)
449 fm_port - port address of OPL-3 FM synthesizer (8x38 only):
451 1 = integrated PCI port (default on 8738),
453 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
455 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
457 This module supports autoprobe and multiple cards.
459 The power-management is supported.
464 Module for sound cards based on CS4231 ISA chips.
466 port - port # for CS4231 chip
467 mpu_port - port # for MPU-401 UART (optional), -1 = disable
468 irq - IRQ # for CS4231 chip
469 mpu_irq - IRQ # for MPU-401 UART
470 dma1 - first DMA # for CS4231 chip
471 dma2 - second DMA # for CS4231 chip
473 This module supports multiple cards. This module does not support autoprobe
474 thus main port must be specified!!! Other ports are optional.
476 The power-management is supported.
481 Module for sound cards based on CS4232/CS4232A,
482 CS4235/CS4236/CS4236B/CS4237B/
483 CS4238B/CS4239 ISA chips.
485 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
487 with isapnp=0, the following options are available:
489 port - port # for CS4236 chip (PnP setup - 0x534)
490 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
491 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
492 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
493 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
494 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
495 dma1 - first DMA # for CS4236 chip (0,1,3)
496 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
498 This module supports multiple cards. This module does not support autoprobe
499 (if ISA PnP is not used) thus main port and control port must be
500 specified!!! Other ports are optional.
502 The power-management is supported.
504 This module is aliased as snd-cs4232 since it provides the old
505 snd-cs4232 functionality, too.
510 Module for Cirrus Logic CS4281 soundchip.
512 dual_codec - Secondary codec ID (0 = disable, default)
514 This module supports multiple cards.
516 The power-management is supported.
521 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
522 CS4624/CS4630/CS4280 PCI chips.
524 external_amp - Force to enable external amplifier.
525 thinkpad - Force to enable Thinkpad's CLKRUN control.
526 mmap_valid - Support OSS mmap mode (default = 0).
528 This module supports multiple cards and autoprobe.
529 Usually external amp and CLKRUN controls are detected automatically
530 from PCI sub vendor/device ids. If they don't work, give the options
533 The power-management is supported.
538 Module for Cyrix/NatSemi Geode 5530 chip.
540 Module snd-cs5535audio
541 ----------------------
543 Module for multifunction CS5535 companion PCI device
545 The power-management is supported.
550 Module for Creative Sound Blaster X-Fi boards (20k1 / 20k2 chips)
551 * Creative Sound Blaster X-Fi Titanium Fatal1ty Champion Series
552 * Creative Sound Blaster X-Fi Titanium Fatal1ty Professional Series
553 * Creative Sound Blaster X-Fi Titanium Professional Audio
554 * Creative Sound Blaster X-Fi Titanium
555 * Creative Sound Blaster X-Fi Elite Pro
556 * Creative Sound Blaster X-Fi Platinum
557 * Creative Sound Blaster X-Fi Fatal1ty
558 * Creative Sound Blaster X-Fi XtremeGamer
559 * Creative Sound Blaster X-Fi XtremeMusic
561 reference_rate - reference sample rate, 44100 or 48000 (default)
562 multiple - multiple to ref. sample rate, 1 or 2 (default)
563 subsystem - override the PCI SSID for probing; the value
564 consists of SSVID << 16 | SSDID. The default is
565 zero, which means no override.
567 This module supports multiple cards.
572 Module for Echoaudio Darla20
574 This module supports multiple cards.
575 The driver requires the firmware loader support on kernel.
580 Module for Echoaudio Darla24
582 This module supports multiple cards.
583 The driver requires the firmware loader support on kernel.
588 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
591 This module supports multiple cards. This module is enabled only with
594 The power-management is supported.
599 Module for the dummy sound card. This "card" doesn't do any output
600 or input, but you may use this module for any application which
601 requires a sound card (like RealPlayer).
603 pcm_devs - Number of PCM devices assigned to each card
604 (default = 1, up to 4)
605 pcm_substreams - Number of PCM substreams assigned to each PCM
606 (default = 8, up to 128)
607 hrtimer - Use hrtimer (=1, default) or system timer (=0)
608 fake_buffer - Fake buffer allocations (default = 1)
610 When multiple PCM devices are created, snd-dummy gives different
611 behavior to each PCM device:
612 0 = interleaved with mmap support
613 1 = non-interleaved with mmap support
614 2 = interleaved without mmap
615 3 = non-interleaved without mmap
617 As default, snd-dummy drivers doesn't allocate the real buffers
618 but either ignores read/write or mmap a single dummy page to all
619 buffer pages, in order to save the resouces. If your apps need
620 the read/ written buffer data to be consistent, pass fake_buffer=0
623 The power-management is supported.
628 Module for Echoaudio 3G cards (Gina3G/Layla3G)
630 This module supports multiple cards.
631 The driver requires the firmware loader support on kernel.
636 Module for EMU10K1/EMU10k2 based PCI sound cards.
637 * Sound Blaster Live!
638 * Sound Blaster PCI 512
639 * Emu APS (partially supported)
640 * Sound Blaster Audigy
642 extin - bitmap of available external inputs for FX8010 (see bellow)
643 extout - bitmap of available external outputs for FX8010 (see bellow)
644 seq_ports - allocated sequencer ports (4 by default)
645 max_synth_voices - limit of voices used for wavetable (64 by default)
646 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
647 given in MB unit. Default value is 128.
648 enable_ir - enable IR
650 This module supports multiple cards and autoprobe.
652 Input & Output configurations [extin/extout]
653 * Creative Card wo/Digital out [0x0003/0x1f03]
654 * Creative Card w/Digital out [0x0003/0x1f0f]
655 * Creative Card w/Digital CD in [0x000f/0x1f0f]
656 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
657 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
658 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
659 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
660 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
661 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
662 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
663 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
664 * Creative Card all ins and outs [0x3fff/0x7fff]
666 The power-management is supported.
671 Module for Creative Emu10k1X (SB Live Dell OEM version)
673 This module supports multiple cards.
678 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
679 * SoundBlaster PCI 64
680 * SoundBlaster PCI 128
682 joystick - Enable joystick (default off)
684 This module supports multiple cards and autoprobe.
686 The power-management is supported.
691 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
692 * SoundBlaster PCI 64
693 * SoundBlaster PCI 128
694 * SoundBlaster Vibra PCI
696 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
697 0 = disable (default), 1 = auto-detect
699 This module supports multiple cards and autoprobe.
701 The power-management is supported.
706 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
708 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
709 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
710 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
711 fm_port - port # for OPL3 (option; share the same port as default)
713 with isapnp=0, the following additional options are available:
714 port - port # for ES-1688 chip (0x220,0x240,0x260)
715 irq - IRQ # for ES-1688 chip (5,7,9,10)
716 dma8 - DMA # for ES-1688 chip (0,1,3)
718 This module supports multiple cards and autoprobe (without MPU-401 port)
719 and PnP with the ES968 chip.
724 Module for ESS AudioDrive ES-18xx sound cards.
726 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
728 with isapnp=0, the following options are available:
730 port - port # for ES-18xx chip (0x220,0x240,0x260)
731 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
732 fm_port - port # for FM (optional, not used)
733 irq - IRQ # for ES-18xx chip (5,7,9,10)
734 dma1 - first DMA # for ES-18xx chip (0,1,3)
735 dma2 - first DMA # for ES-18xx chip (0,1,3)
737 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
738 port if native ISA PnP routines are not used).
739 When dma2 is equal with dma1, the driver works as half-duplex.
741 The power-management is supported.
746 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
748 This module supports multiple cards and autoprobe.
750 The power-management is supported.
755 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
757 total_bufsize - total buffer size in kB (1-4096kB)
758 pcm_substreams_p - playback channels (1-8, default=2)
759 pcm_substreams_c - capture channels (1-8, default=0)
760 clock - clock (0 = auto-detection)
761 use_pm - support the power-management (0 = off, 1 = on,
763 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
764 joystick - enable joystick (default off)
766 This module supports multiple cards and autoprobe.
768 The power-management is supported.
773 Module for ForteMedia FM801 based PCI sound cards.
775 tea575x_tuner - Enable TEA575x tuner
776 - 1 = MediaForte 256-PCS
777 - 2 = MediaForte 256-PCPR
778 - 3 = MediaForte 64-PCR
779 - High 16-bits are video (radio) device number + 1
780 - example: 0x10002 (MediaForte 256-PCPR, device 1)
782 This module supports multiple cards and autoprobe.
784 The power-management is supported.
789 Module for Echoaudio Gina20
791 This module supports multiple cards.
792 The driver requires the firmware loader support on kernel.
797 Module for Echoaudio Gina24
799 This module supports multiple cards.
800 The driver requires the firmware loader support on kernel.
802 Module snd-gusclassic
803 ---------------------
805 Module for Gravis UltraSound Classic sound card.
807 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
808 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
809 dma1 - DMA # for GF1 chip (1,3,5,6,7)
810 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
811 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
812 voices - GF1 voices limit (14-32)
813 pcm_voices - reserved PCM voices
815 This module supports multiple cards and autoprobe.
817 Module snd-gusextreme
818 ---------------------
820 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
822 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
823 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
824 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
825 irq - IRQ # for ES-1688 chip (5,7,9,10)
826 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
827 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
828 dma8 - DMA # for ES-1688 chip (0,1,3)
829 dma1 - DMA # for GF1 chip (1,3,5,6,7)
830 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
831 voices - GF1 voices limit (14-32)
832 pcm_voices - reserved PCM voices
834 This module supports multiple cards and autoprobe (without MPU-401 port).
839 Module for Gravis UltraSound MAX sound card.
841 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
842 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
843 dma1 - DMA # for GF1 chip (1,3,5,6,7)
844 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
845 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
846 voices - GF1 voices limit (14-32)
847 pcm_voices - reserved PCM voices
849 This module supports multiple cards and autoprobe.
854 Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8, ICH9, ICH10,
856 ATI SB450, SB600, R600, RS600, RS690, RS780, RV610, RV620,
857 RV630, RV635, RV670, RV770,
861 [Multiple options for each card instance]
862 model - force the model name
863 position_fix - Fix DMA pointer
864 -1 = system default: choose appropriate one per controller
866 0 = auto: falls back to LPIB when POSBUF doesn't work
868 2 = POSBUF: use position buffer
869 3 = VIACOMBO: VIA-specific workaround for capture
870 4 = COMBO: use LPIB for playback, auto for capture stream
871 probe_mask - Bitmask to probe codecs (default = -1, meaning all slots)
872 When the bit 8 (0x100) is set, the lower 8 bits are used
873 as the "fixed" codec slots; i.e. the driver probes the
874 slots regardless what hardware reports back
875 probe_only - Only probing and no codec initialization (default=off);
876 Useful to check the initial codec status for debugging
877 bdl_pos_adj - Specifies the DMA IRQ timing delay in samples.
878 Passing -1 will make the driver to choose the appropriate
879 value based on the controller chip.
880 patch - Specifies the early "patch" files to modify the HD-audio
881 setup before initializing the codecs. This option is
882 available only when CONFIG_SND_HDA_PATCH_LOADER=y is set.
883 See HD-Audio.txt for details.
884 beep_mode - Selects the beep registration mode (0=off, 1=on); default
885 value is set via CONFIG_SND_HDA_INPUT_BEEP_MODE kconfig.
887 [Single (global) options]
888 single_cmd - Use single immediate commands to communicate with
889 codecs (for debugging only)
890 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
891 power_save - Automatic power-saving timeout (in second, 0 =
893 power_save_controller - Support runtime D3 of HD-audio controller
894 (-1 = on for supported chip (default), false = off,
895 true = force to on even for unsupported hardware)
896 align_buffer_size - Force rounding of buffer/period sizes to multiples
897 of 128 bytes. This is more efficient in terms of memory
898 access but isn't required by the HDA spec and prevents
899 users from specifying exact period/buffer sizes.
901 snoop - Enable/disable snooping (default = on)
903 This module supports multiple cards and autoprobe.
905 See Documentation/sound/alsa/HD-Audio.txt for more details about
908 Each codec may have a model table for different configurations.
909 If your machine isn't listed there, the default (usually minimal)
910 configuration is set up. You can pass "model=<name>" option to
911 specify a certain model in such a case. There are different
912 models depending on the codec chip. The list of available models
913 is found in HD-Audio-Models.txt
915 The model name "genric" is treated as a special case. When this
916 model is given, the driver uses the generic codec parser without
917 "codec-patch". It's sometimes good for testing and debugging.
919 If the default configuration doesn't work and one of the above
920 matches with your device, report it together with alsa-info.sh
921 output (with --no-upload option) to kernel bugzilla or alsa-devel
922 ML (see the section "Links and Addresses").
924 power_save and power_save_controller options are for power-saving
925 mode. See powersave.txt for details.
927 Note 2: If you get click noises on output, try the module option
928 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
929 register value without FIFO size correction as the current
930 DMA pointer. position_fix=2 will make the driver to use
931 the position buffer instead of reading SD_LPIB register.
932 (Usually SD_LPIB register is more accurate than the
935 position_fix=3 is specific to VIA devices. The position
936 of the capture stream is checked from both LPIB and POSBUF
937 values. position_fix=4 is a combination mode, using LPIB
938 for playback and POSBUF for capture.
940 NB: If you get many "azx_get_response timeout" messages at
941 loading, it's likely a problem of interrupts (e.g. ACPI irq
942 routing). Try to boot with options like "pci=noacpi". Also, you
943 can try "single_cmd=1" module option. This will switch the
944 communication method between HDA controller and codecs to the
945 single immediate commands instead of CORB/RIRB. Basically, the
946 single command mode is provided only for BIOS, and you won't get
947 unsolicited events, too. But, at least, this works independently
948 from the irq. Remember this is a last resort, and should be
949 avoided as much as possible...
951 MORE NOTES ON "azx_get_response timeout" PROBLEMS:
952 On some hardwares, you may need to add a proper probe_mask option
953 to avoid the "azx_get_response timeout" problem above, instead.
954 This occurs when the access to non-existing or non-working codec slot
955 (likely a modem one) causes a stall of the communication via HD-audio
956 bus. You can see which codec slots are probed by enabling
957 CONFIG_SND_DEBUG_VERBOSE, or simply from the file name of the codec
958 proc files. Then limit the slots to probe by probe_mask option.
959 For example, probe_mask=1 means to probe only the first slot, and
960 probe_mask=4 means only the third slot.
962 The power-management is supported.
967 Module for RME Hammerfall DSP audio interface(s)
969 This module supports multiple cards.
971 Note: The firmware data can be automatically loaded via hotplug
972 when CONFIG_FW_LOADER is set. Otherwise, you need to load
973 the firmware via hdsploader utility included in alsa-tools
975 The firmware data is found in alsa-firmware package.
977 Note: snd-page-alloc module does the job which snd-hammerfall-mem
978 module did formerly. It will allocate the buffers in advance
979 when any HDSP cards are found. To make the buffer
980 allocation sure, load snd-page-alloc module in the early
981 stage of boot sequence. See "Early Buffer Allocation"
987 Module for RME HDSP MADI board.
989 precise_ptr - Enable precise pointer, or disable.
990 line_outs_monitor - Send playback streams to analog outs by default.
991 enable_monitor - Enable Analog Out on Channel 63/64 by default.
993 See hdspm.txt for details.
998 Module for Envy24 (ICE1712) based PCI sound cards.
999 * MidiMan M Audio Delta 1010
1000 * MidiMan M Audio Delta 1010LT
1001 * MidiMan M Audio Delta DiO 2496
1002 * MidiMan M Audio Delta 66
1003 * MidiMan M Audio Delta 44
1004 * MidiMan M Audio Delta 410
1005 * MidiMan M Audio Audiophile 2496
1008 * TerraTec EWX 24/96
1009 * TerraTec DMX 6Fire
1011 * Hoontech SoundTrack DSP 24
1012 * Hoontech SoundTrack DSP 24 Value
1013 * Hoontech SoundTrack DSP 24 Media 7.1
1014 * Event Electronics, EZ8
1016 * Lionstracs, Mediastaton
1019 model - Use the given board model, one of the following:
1020 delta1010, dio2496, delta66, delta44, audiophile, delta410,
1021 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
1022 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
1023 phase88, mediastation
1024 omni - Omni I/O support for MidiMan M-Audio Delta44/66
1025 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transceiver)
1026 in msec resolution, default value is 500 (0.5 sec)
1028 This module supports multiple cards and autoprobe. Note: The consumer part
1029 is not used with all Envy24 based cards (for example in the MidiMan Delta
1032 Note: The supported board is detected by reading EEPROM or PCI
1033 SSID (if EEPROM isn't available). You can override the
1034 model by passing "model" module option in case that the
1035 driver isn't configured properly or you want to try another
1041 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
1042 * MidiMan M Audio Revolution 5.1
1043 * MidiMan M Audio Revolution 7.1
1044 * MidiMan M Audio Audiophile 192
1046 * TerraTec Aureon 5.1 Sky
1047 * TerraTec Aureon 7.1 Space
1048 * TerraTec Aureon 7.1 Universe
1051 * AudioTrak Prodigy 7.1
1052 * AudioTrak Prodigy 7.1 LT
1053 * AudioTrak Prodigy 7.1 XT
1054 * AudioTrak Prodigy 7.1 HIFI
1055 * AudioTrak Prodigy 7.1 HD2
1056 * AudioTrak Prodigy 192
1058 * Albatron K8X800 Pro II
1059 * Chaintech ZNF3-150
1060 * Chaintech ZNF3-250
1068 * Hercules Fortissimo IV
1069 * EGO-SYS WaveTerminal 192M
1071 model - Use the given board model, one of the following:
1072 revo51, revo71, amp2000, prodigy71, prodigy71lt,
1073 prodigy71xt, prodigy71hifi, prodigyhd2, prodigy192,
1074 juli, aureon51, aureon71, universe, ap192, k8x800,
1075 phase22, phase28, ms300, av710, se200pci, se90pci,
1076 fortissimo4, sn25p, WT192M, maya44
1078 This module supports multiple cards and autoprobe.
1080 Note: The supported board is detected by reading EEPROM or PCI
1081 SSID (if EEPROM isn't available). You can override the
1082 model by passing "model" module option in case that the
1083 driver isn't configured properly or you want to try another
1089 Module for Echoaudio Indigo
1091 This module supports multiple cards.
1092 The driver requires the firmware loader support on kernel.
1097 Module for Echoaudio Indigo DJ
1099 This module supports multiple cards.
1100 The driver requires the firmware loader support on kernel.
1105 Module for Echoaudio Indigo IO
1107 This module supports multiple cards.
1108 The driver requires the firmware loader support on kernel.
1113 Module for AC'97 motherboards from Intel and compatibles.
1114 * Intel i810/810E, i815, i820, i830, i84x, MX440
1115 ICH5, ICH6, ICH7, 6300ESB, ESB2
1116 * SiS 7012 (SiS 735)
1117 * NVidia NForce, NForce2, NForce3, MCP04, CK804
1119 * AMD AMD768, AMD8111
1122 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1123 ac97_quirk - AC'97 workaround for strange hardware
1124 See "AC97 Quirk Option" section below.
1125 buggy_irq - Enable workaround for buggy interrupts on some
1126 motherboards (default yes on nForce chips,
1128 buggy_semaphore - Enable workaround for hardwares with buggy
1129 semaphores (e.g. on some ASUS laptops)
1131 spdif_aclink - Use S/PDIF over AC-link instead of direct connection
1132 from the controller chip
1133 (0 = off, 1 = on, -1 = default)
1135 This module supports one chip and autoprobe.
1137 Note: the latest driver supports auto-detection of chip clock.
1138 if you still encounter too fast playback, specify the clock
1139 explicitly via the module option "ac97_clock=41194".
1141 Joystick/MIDI ports are not supported by this driver. If your
1142 motherboard has these devices, use the ns558 or snd-mpu401
1143 modules, respectively.
1145 The power-management is supported.
1147 Module snd-intel8x0m
1148 --------------------
1150 Module for Intel ICH (i8x0) chipset MC97 modems.
1151 * Intel i810/810E, i815, i820, i830, i84x, MX440
1153 * SiS 7013 (SiS 735)
1154 * NVidia NForce, NForce2, NForce2s, NForce3
1158 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1160 This module supports one card and autoprobe.
1162 Note: The default index value of this module is -2, i.e. the first
1165 The power-management is supported.
1167 Module snd-interwave
1168 --------------------
1170 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
1171 and other sound cards based on AMD InterWave (tm) chip.
1173 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1174 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1175 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1176 effect - 1 = InterWave effects enable (default 0);
1178 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1180 with isapnp=0, the following options are available:
1182 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1183 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1184 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1185 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1187 This module supports multiple cards, autoprobe and ISA PnP.
1189 Module snd-interwave-stb
1190 ------------------------
1192 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
1193 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
1194 circuit for extended control of bass, treble and master volume.
1196 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1197 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1198 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1199 effect - 1 = InterWave effects enable (default 0);
1201 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1203 with isapnp=0, the following options are available:
1205 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1206 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
1207 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1208 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1209 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1211 This module supports multiple cards, autoprobe and ISA PnP.
1216 Module for Media Vision Jazz16 chipset. The chipset consists of 3 chips:
1217 MVD1216 + MVA416 + MVA514.
1219 port - port # for SB DSP chip (0x210,0x220,0x230,0x240,0x250,0x260)
1220 irq - IRQ # for SB DSP chip (3,5,7,9,10,15)
1221 dma8 - DMA # for SB DSP chip (1,3)
1222 dma16 - DMA # for SB DSP chip (5,7)
1223 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1224 mpu_irq - MPU-401 irq # (2,3,5,7)
1226 This module supports multiple cards.
1231 Module for Korg 1212 IO PCI card
1233 This module supports multiple cards.
1238 Module for Echoaudio Layla20
1240 This module supports multiple cards.
1241 The driver requires the firmware loader support on kernel.
1246 Module for Echoaudio Layla24
1248 This module supports multiple cards.
1249 The driver requires the firmware loader support on kernel.
1254 Module for Digigram Lola PCI-e boards
1256 This module supports multiple cards.
1261 Module for Digigram LX6464ES boards
1263 This module supports multiple cards.
1268 Module for Allegro/Maestro3 chips
1270 external_amp - enable external amp (enabled by default)
1271 amp_gpio - GPIO pin number for external amp (0-15) or
1272 -1 for default pin (8 for allegro, 1 for
1275 This module supports autoprobe and multiple chips.
1277 Note: the binding of amplifier is dependent on hardware.
1278 If there is no sound even though all channels are unmuted, try to
1279 specify other gpio connection via amp_gpio option.
1280 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1283 The power-management is supported.
1288 Module for Echoaudio Mia
1290 This module supports multiple cards.
1291 The driver requires the firmware loader support on kernel.
1296 Module for Miro soundcards: miroSOUND PCM 1 pro,
1298 miroSOUND PCM 20 Radio.
1300 port - Port # (0x530,0x604,0xe80,0xf40)
1301 irq - IRQ # (5,7,9,10,11)
1302 dma1 - 1st dma # (0,1,3)
1303 dma2 - 2nd dma # (0,1)
1304 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1305 mpu_irq - MPU-401 irq # (5,7,9,10)
1306 fm_port - FM Port # (0x388)
1307 wss - enable WSS mode
1308 ide - enable onboard ide support
1313 Module for Digigram miXart8 sound cards.
1315 This module supports multiple cards.
1316 Note: One miXart8 board will be represented as 4 alsa cards.
1317 See MIXART.txt for details.
1319 When the driver is compiled as a module and the hotplug firmware
1320 is supported, the firmware data is loaded via hotplug automatically.
1321 Install the necessary firmware files in alsa-firmware package.
1322 When no hotplug fw loader is available, you need to load the
1323 firmware via mixartloader utility in alsa-tools package.
1328 Module for Echoaudio Mona
1330 This module supports multiple cards.
1331 The driver requires the firmware loader support on kernel.
1336 Module for MPU-401 UART devices.
1338 port - port number or -1 (disable)
1339 irq - IRQ number or -1 (disable)
1340 pnp - PnP detection - 0 = disable, 1 = enable (default)
1342 This module supports multiple devices and PnP.
1344 Module snd-msnd-classic
1345 -----------------------
1347 Module for Turtle Beach MultiSound Classic, Tahiti or Monterey
1350 io - Port # for msnd-classic card
1351 irq - IRQ # for msnd-classic card
1352 mem - Memory address (0xb0000, 0xc8000, 0xd0000, 0xd8000,
1354 write_ndelay - enable write ndelay (default = 1)
1355 calibrate_signal - calibrate signal (default = 0)
1356 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1357 digital - Digital daughterboard present (default = 0)
1358 cfg - Config port (0x250, 0x260 or 0x270) default = PnP
1359 reset - Reset all devices
1360 mpu_io - MPU401 I/O port
1361 mpu_irq - MPU401 irq#
1362 ide_io0 - IDE port #0
1363 ide_io1 - IDE port #1
1365 joystick_io - Joystick I/O port
1367 The driver requires firmware files "turtlebeach/msndinit.bin" and
1368 "turtlebeach/msndperm.bin" in the proper firmware directory.
1370 See Documentation/sound/oss/MultiSound for important information
1371 about this driver. Note that it has been discontinued, but the
1372 Voyetra Turtle Beach knowledge base entry for it is still available
1374 http://www.turtlebeach.com
1376 Module snd-msnd-pinnacle
1377 ------------------------
1379 Module for Turtle Beach MultiSound Pinnacle/Fiji soundcards.
1381 io - Port # for pinnacle/fiji card
1382 irq - IRQ # for pinnalce/fiji card
1383 mem - Memory address (0xb0000, 0xc8000, 0xd0000, 0xd8000,
1385 write_ndelay - enable write ndelay (default = 1)
1386 calibrate_signal - calibrate signal (default = 0)
1387 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1389 The driver requires firmware files "turtlebeach/pndspini.bin" and
1390 "turtlebeach/pndsperm.bin" in the proper firmware directory.
1395 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1398 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1399 irq - IRQ # for MTPAV (7,5, default=7)
1400 hwports - number of supported hardware ports, default=8.
1402 Module supports only 1 card. This module has no enable option.
1407 Module for Ego Systems (ESI) Miditerminal 4140
1409 This module supports multiple devices.
1410 Requires parport (CONFIG_PARPORT).
1415 Module for NeoMagic NM256AV/ZX chips
1417 playback_bufsize - max playback frame size in kB (4-128kB)
1418 capture_bufsize - max capture frame size in kB (4-128kB)
1419 force_ac97 - 0 or 1 (disabled by default)
1420 buffer_top - specify buffer top address
1421 use_cache - 0 or 1 (disabled by default)
1422 vaio_hack - alias buffer_top=0x25a800
1423 reset_workaround - enable AC97 RESET workaround for some laptops
1424 reset_workaround2 - enable extended AC97 RESET workaround for some
1427 This module supports one chip and autoprobe.
1429 The power-management is supported.
1431 Note: on some notebooks the buffer address cannot be detected
1432 automatically, or causes hang-up during initialization.
1433 In such a case, specify the buffer top address explicitly via
1434 the buffer_top option.
1436 Sony F250: buffer_top=0x25a800
1437 Sony F270: buffer_top=0x272800
1438 The driver supports only ac97 codec. It's possible to force
1439 to initialize/use ac97 although it's not detected. In such a
1440 case, use force_ac97=1 option - but *NO* guarantee whether it
1443 Note: The NM256 chip can be linked internally with non-AC97
1444 codecs. This driver supports only the AC97 codec, and won't work
1445 with machines with other (most likely CS423x or OPL3SAx) chips,
1446 even though the device is detected in lspci. In such a case, try
1447 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1448 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1449 and proper hardware parameters in the case without ISA PnP.
1451 Note: some laptops need a workaround for AC97 RESET. For the
1452 known hardware like Dell Latitude LS and Sony PCG-F305, this
1453 workaround is enabled automatically. For other laptops with a
1454 hard freeze, you can try reset_workaround=1 option.
1456 Note: Dell Latitude CSx laptops have another problem regarding
1457 AC97 RESET. On these laptops, reset_workaround2 option is
1458 turned on as default. This option is worth to try if the
1459 previous reset_workaround option doesn't help.
1461 Note: This driver is really crappy. It's a porting from the
1462 OSS driver, which is a result of black-magic reverse engineering.
1463 The detection of codec will fail if the driver is loaded *after*
1464 X-server as described above. You might be able to force to load
1465 the module, but it may result in hang-up. Hence, make sure that
1466 you load this module *before* X if you encounter this kind of
1472 Module for Yamaha OPL3-SA2/SA3 sound cards.
1474 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1476 with isapnp=0, the following options are available:
1478 port - control port # for OPL3-SA chip (0x370)
1479 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1480 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1481 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1482 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1483 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1484 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1485 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1487 This module supports multiple cards and ISA PnP. It does not support
1488 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1490 The power-management is supported.
1492 Module snd-opti92x-ad1848
1493 -------------------------
1495 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1496 Module works with OAK Mozart cards as well.
1498 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1500 with isapnp=0, the following options are available:
1502 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1503 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1504 fm_port - port # for OPL3 device (0x388)
1505 irq - IRQ # for WSS chip (5,7,9,10,11)
1506 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1507 dma1 - first DMA # for WSS chip (0,1,3)
1509 This module supports only one card, autoprobe and PnP.
1511 Module snd-opti92x-cs4231
1512 -------------------------
1514 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1516 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1518 with isapnp=0, the following options are available:
1520 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1521 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1522 fm_port - port # for OPL3 device (0x388)
1523 irq - IRQ # for WSS chip (5,7,9,10,11)
1524 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1525 dma1 - first DMA # for WSS chip (0,1,3)
1526 dma2 - second DMA # for WSS chip (0,1,3)
1528 This module supports only one card, autoprobe and PnP.
1533 Module for sound cards based on OPTi 82c93x chips.
1535 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1537 with isapnp=0, the following options are available:
1539 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1540 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1541 fm_port - port # for OPL3 device (0x388)
1542 irq - IRQ # for WSS chip (5,7,9,10,11)
1543 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1544 dma1 - first DMA # for WSS chip (0,1,3)
1545 dma2 - second DMA # for WSS chip (0,1,3)
1547 This module supports only one card, autoprobe and PnP.
1552 Module for sound cards based on the C-Media CMI8786/8787/8788 chip:
1555 * AuzenTech X-Meridian
1556 * AuzenTech X-Meridian 2G
1558 * Club3D Theatron DTS
1559 * HT-Omega Claro (plus)
1560 * HT-Omega Claro halo (XT)
1561 * Kuroutoshikou CMI8787-HG2PCI
1562 * Razer Barracuda AC-1
1564 * TempoTec HiFier Fantasia
1565 * TempoTec HiFier Serenade
1567 This module supports autoprobe and multiple cards.
1572 Module for internal PC-Speaker.
1574 nopcm - Disable PC-Speaker PCM sound. Only beeps remain.
1575 nforce_wa - enable NForce chipset workaround. Expect bad sound.
1577 This module supports system beeps, some kind of PCM playback and
1578 even a few mixer controls.
1583 Module for Digigram PCXHR boards
1585 This module supports multiple cards.
1587 Module snd-portman2x4
1588 ---------------------
1590 Module for Midiman Portman 2x4 parallel port MIDI interface
1592 This module supports multiple cards.
1594 Module snd-powermac (on ppc only)
1595 ---------------------------------
1597 Module for PowerMac, iMac and iBook on-board soundchips
1599 enable_beep - enable beep using PCM (enabled as default)
1601 Module supports autoprobe a chip.
1603 Note: the driver may have problems regarding endianness.
1605 The power-management is supported.
1607 Module snd-pxa2xx-ac97 (on arm only)
1608 ------------------------------------
1610 Module for AC97 driver for the Intel PXA2xx chip
1612 For ARM architecture only.
1614 The power-management is supported.
1619 Module for Conexant Riptide chip
1621 joystick_port - Joystick port # (default: 0x200)
1622 mpu_port - MPU401 port # (default: 0x330)
1623 opl3_port - OPL3 port # (default: 0x388)
1625 This module supports multiple cards.
1626 The driver requires the firmware loader support on kernel.
1627 You need to install the firmware file "riptide.hex" to the standard
1628 firmware path (e.g. /lib/firmware).
1633 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1634 Prodif96 and Prodif Gold) sound cards.
1636 This module supports multiple cards.
1641 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1643 This module supports multiple cards.
1648 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1650 precise_ptr - Enable precise pointer (doesn't work reliably).
1653 This module supports multiple cards.
1655 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1656 module did formerly. It will allocate the buffers in advance
1657 when any RME9652 cards are found. To make the buffer
1658 allocation sure, load snd-page-alloc module in the early
1659 stage of boot sequence. See "Early Buffer Allocation"
1662 Module snd-sa11xx-uda1341 (on arm only)
1663 ---------------------------------------
1665 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1667 Module supports only one card.
1668 Module has no enable and index options.
1670 The power-management is supported.
1675 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1679 port - port # for SB DSP chip (0x220,0x240,0x260)
1680 irq - IRQ # for SB DSP chip (5,7,9,10)
1681 dma8 - DMA # for SB DSP chip (1,3)
1683 This module supports multiple cards and autoprobe.
1685 The power-management is supported.
1687 Module snd-sb16 and snd-sbawe
1688 -----------------------------
1690 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1691 SoundBlaster AWE 32 (PnP),
1692 SoundBlaster AWE 64 PnP
1694 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1695 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1696 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1698 with isapnp=0, the following options are available:
1700 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1701 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1702 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1703 (snd-sbawe module only)
1704 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1705 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1706 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1708 This module supports multiple cards, autoprobe and ISA PnP.
1710 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1711 disable 16bit DMA with dma16 = -1 module parameter.
1712 Also, all Sound Blaster 16 type cards can operate in 16-bit
1713 half duplex mode through 8-bit DMA channel by disabling their
1716 The power-management is supported.
1721 Module for Gallant SC-6000 soundcard and later models: SC-6600
1724 port - Port # (0x220 or 0x240)
1725 mss_port - MSS Port # (0x530 or 0xe80)
1726 irq - IRQ # (5,7,9,10,11)
1727 mpu_irq - MPU-401 IRQ # (5,7,9,10) ,0 - no MPU-401 irq
1729 joystick - Enable gameport - 0 = disable (default), 1 = enable
1731 This module supports multiple cards.
1733 This card is also known as Audio Excel DSP 16 or Zoltrix AV302.
1738 Module for ENSONIQ SoundScape cards.
1740 port - Port # (PnP setup)
1741 wss_port - WSS Port # (PnP setup)
1742 irq - IRQ # (PnP setup)
1743 mpu_irq - MPU-401 IRQ # (PnP setup)
1744 dma - DMA # (PnP setup)
1745 dma2 - 2nd DMA # (PnP setup, -1 to disable)
1746 joystick - Enable gameport - 0 = disable (default), 1 = enable
1748 This module supports multiple cards.
1750 The driver requires the firmware loader support on kernel.
1752 Module snd-sun-amd7930 (on sparc only)
1753 --------------------------------------
1755 Module for AMD7930 sound chips found on Sparcs.
1757 This module supports multiple cards.
1759 Module snd-sun-cs4231 (on sparc only)
1760 -------------------------------------
1762 Module for CS4231 sound chips found on Sparcs.
1764 This module supports multiple cards.
1766 Module snd-sun-dbri (on sparc only)
1767 -----------------------------------
1769 Module for DBRI sound chips found on Sparcs.
1771 This module supports multiple cards.
1773 Module snd-wavefront
1774 --------------------
1776 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1778 use_cs4232_midi - Use CS4232 MPU-401 interface
1779 (inaccessibly located inside your computer)
1780 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1782 with isapnp=0, the following options are available:
1784 cs4232_pcm_port - Port # for CS4232 PCM interface.
1785 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1786 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1787 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1788 ics2115_port - Port # for ICS2115
1789 ics2115_irq - IRQ # for ICS2115
1790 fm_port - FM OPL-3 Port #
1791 dma1 - DMA1 # for CS4232 PCM interface.
1792 dma2 - DMA2 # for CS4232 PCM interface.
1794 The below are options for wavefront_synth features:
1795 wf_raw - Assume that we need to boot the OS (default:no)
1796 If yes, then during driver loading, the state of the board is
1797 ignored, and we reset the board and load the firmware anyway.
1798 fx_raw - Assume that the FX process needs help (default:yes)
1799 If false, we'll leave the FX processor in whatever state it is
1800 when the driver is loaded. The default is to download the
1801 microprogram and associated coefficients to set it up for
1802 "default" operation, whatever that means.
1803 debug_default - Debug parameters for card initialization
1804 wait_usecs - How long to wait without sleeping, usecs
1806 This magic number seems to give pretty optimal throughput
1807 based on my limited experimentation.
1808 If you want to play around with it and find a better value, be
1809 my guest. Remember, the idea is to get a number that causes us
1810 to just busy wait for as many WaveFront commands as possible,
1811 without coming up with a number so large that we hog the whole
1813 Specifically, with this number, out of about 134,000 status
1814 waits, only about 250 result in a sleep.
1815 sleep_interval - How long to sleep when waiting for reply
1817 sleep_tries - How many times to try sleeping during a wait
1819 ospath - Pathname to processed ICS2115 OS firmware
1820 (default:wavefront.os)
1821 The path name of the ISC2115 OS firmware. In the recent
1822 version, it's handled via firmware loader framework, so it
1823 must be installed in the proper path, typically,
1825 reset_time - How long to wait for a reset to take effect
1827 ramcheck_time - How many seconds to wait for the RAM test
1829 osrun_time - How many seconds to wait for the ICS2115 OS
1832 This module supports multiple cards and ISA PnP.
1834 Note: the firmware file "wavefront.os" was located in the earlier
1835 version in /etc. Now it's loaded via firmware loader, and
1836 must be in the proper firmware path, such as /lib/firmware.
1837 Copy (or symlink) the file appropriately if you get an error
1838 regarding firmware downloading after upgrading the kernel.
1840 Module snd-sonicvibes
1841 ---------------------
1843 Module for S3 SonicVibes PCI sound cards.
1844 * PINE Schubert 32 PCI
1846 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1847 - SoundCard must have onboard SRAM for this.
1848 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1850 This module supports multiple cards and autoprobe.
1852 Module snd-serial-u16550
1853 ------------------------
1855 Module for UART16550A serial MIDI ports.
1857 port - port # for UART16550A chip
1858 irq - IRQ # for UART16550A chip, -1 = poll mode
1859 speed - speed in bauds (9600,19200,38400,57600,115200)
1861 base - base for divisor in bauds (57600,115200,230400,460800)
1863 outs - number of MIDI ports in a serial port (1-4)
1865 adaptor - Type of adaptor.
1866 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1867 3 = MS-124W M/B, 4 = Generic
1869 This module supports multiple cards. This module does not support autoprobe
1870 thus the main port must be specified!!! Other options are optional.
1875 Module for Trident 4DWave DX/NX sound cards.
1876 * Best Union Miss Melody 4DWave PCI
1878 * Warpspeed ONSpeed 4DWave PCI
1881 * CHIC True Sound 4Dwave
1882 * Shark Predator4D-PCI
1883 * Jaton SonicWave 4D
1884 * SiS SI7018 PCI Audio
1885 * Hoontech SoundTrack Digital 4DWave NX
1887 pcm_channels - max channels (voices) reserved for PCM
1888 wavetable_size - max wavetable size in kB (4-?kb)
1890 This module supports multiple cards and autoprobe.
1892 The power-management is supported.
1897 Module for the Edirol UA-101/UA-1000 audio/MIDI interfaces.
1899 This module supports multiple devices, autoprobe and hotplugging.
1901 Module snd-usb-audio
1902 --------------------
1904 Module for USB audio and USB MIDI devices.
1906 vid - Vendor ID for the device (optional)
1907 pid - Product ID for the device (optional)
1908 nrpacks - Max. number of packets per URB (default: 8)
1909 device_setup - Device specific magic number (optional)
1910 - Influence depends on the device
1912 ignore_ctl_error - Ignore any USB-controller regarding mixer
1913 interface (default: no)
1915 This module supports multiple devices, autoprobe and hotplugging.
1917 NB: nrpacks parameter can be modified dynamically via sysfs.
1918 Don't put the value over 20. Changing via sysfs has no sanity
1920 NB: ignore_ctl_error=1 may help when you get an error at accessing
1921 the mixer element such as URB error -22. This happens on some
1922 buggy USB device or the controller.
1924 Module snd-usb-caiaq
1925 --------------------
1927 Module for caiaq UB audio interfaces,
1928 * Native Instruments RigKontrol2
1929 * Native Instruments Kore Controller
1930 * Native Instruments Audio Kontrol 1
1931 * Native Instruments Audio 8 DJ
1933 This module supports multiple devices, autoprobe and hotplugging.
1935 Module snd-usb-usx2y
1936 --------------------
1938 Module for Tascam USB US-122, US-224 and US-428 devices.
1940 This module supports multiple devices, autoprobe and hotplugging.
1942 Note: you need to load the firmware via usx2yloader utility included
1943 in alsa-tools and alsa-firmware packages.
1948 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1949 8233A, 8233C, 8235, 8237 (south) bridge.
1951 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1953 joystick - Enable joystick (default off) [VIA686A/686B only]
1954 ac97_clock - AC'97 codec clock base (default 48000Hz)
1955 dxs_support - support DXS channels,
1956 0 = auto (default), 1 = enable, 2 = disable,
1957 3 = 48k only, 4 = no VRA, 5 = enable any sample
1958 rate and different sample rates on different
1960 [VIA8233/C, 8235, 8237 only]
1961 ac97_quirk - AC'97 workaround for strange hardware
1962 See "AC97 Quirk Option" section below.
1964 This module supports one chip and autoprobe.
1966 Note: on some SMP motherboards like MSI 694D the interrupts might
1967 not be generated properly. In such a case, please try to
1968 set the SMP (or MPS) version on BIOS to 1.1 instead of
1969 default value 1.4. Then the interrupt number will be
1970 assigned under 15. You might also upgrade your BIOS.
1972 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1973 channels as the first PCM. On these channels, up to 4
1974 streams can be played at the same time, and the controller
1975 can perform sample rate conversion with separate rates for
1977 As default (dxs_support = 0), 48k fixed rate is chosen
1978 except for the known devices since the output is often
1979 noisy except for 48k on some mother boards due to the
1981 Please try once dxs_support=5 and if it works on other
1982 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1983 know the PCI subsystem vendor/device id's (output of
1985 If dxs_support=5 does not work, try dxs_support=4; if it
1986 doesn't work too, try dxs_support=1. (dxs_support=1 is
1987 usually for old motherboards. The correct implemented
1988 board should work with 4 or 5.) If it still doesn't
1989 work and the default setting is ok, dxs_support=3 is the
1990 right choice. If the default setting doesn't work at all,
1991 try dxs_support=2 to disable the DXS channels.
1992 In any cases, please let us know the result and the
1993 subsystem vendor/device ids. See "Links and Addresses"
1996 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1997 additionally. The mpu_port option is for VIA686 chips only.
1999 The power-management is supported.
2001 Module snd-via82xx-modem
2002 ------------------------
2004 Module for VIA82xx AC97 modem
2006 ac97_clock - AC'97 codec clock base (default 48000Hz)
2008 This module supports one card and autoprobe.
2010 Note: The default index value of this module is -2, i.e. the first
2013 The power-management is supported.
2018 Module for virtual rawmidi devices.
2019 This module creates virtual rawmidi devices which communicate
2020 to the corresponding ALSA sequencer ports.
2022 midi_devs - MIDI devices # (1-4, default=4)
2024 This module supports multiple cards.
2029 Module for sound cards based on the Asus AV66/AV100/AV200 chips,
2030 i.e., Xonar D1, DX, D2, D2X, DS, Essence ST (Deluxe), Essence STX,
2031 HDAV1.3 (Deluxe), and HDAV1.3 Slim.
2033 This module supports autoprobe and multiple cards.
2038 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
2040 mic - Enable Microphone on V222 Mic (NYI)
2041 ibl - Capture IBL size. (default = 0, minimum size)
2043 This module supports multiple cards.
2045 When the driver is compiled as a module and the hotplug firmware
2046 is supported, the firmware data is loaded via hotplug automatically.
2047 Install the necessary firmware files in alsa-firmware package.
2048 When no hotplug fw loader is available, you need to load the
2049 firmware via vxloader utility in alsa-tools package. To invoke
2050 vxloader automatically, add the following to /etc/modprobe.d/alsa.conf
2052 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
2054 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
2055 /etc/modules.conf, instead.)
2056 IBL size defines the interrupts period for PCM. The smaller size
2057 gives smaller latency but leads to more CPU consumption, too.
2058 The size is usually aligned to 126. As default (=0), the smallest
2059 size is chosen. The possible IBL values can be found in
2060 /proc/asound/cardX/vx-status proc file.
2062 The power-management is supported.
2067 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
2069 ibl - Capture IBL size. (default = 0, minimum size)
2071 This module supports multiple cards. The module is compiled only when
2072 PCMCIA is supported on kernel.
2074 With the older 2.6.x kernel, to activate the driver via the card
2075 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
2076 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
2077 longer require a config file.
2079 When the driver is compiled as a module and the hotplug firmware
2080 is supported, the firmware data is loaded via hotplug automatically.
2081 Install the necessary firmware files in alsa-firmware package.
2082 When no hotplug fw loader is available, you need to load the
2083 firmware via vxloader utility in alsa-tools package.
2085 About capture IBL, see the description of snd-vx222 module.
2087 Note: snd-vxp440 driver is merged to snd-vxpocket driver since
2090 The power-management is supported.
2095 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
2097 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
2098 1 (auto-detect for YMF744/754 only)
2099 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
2100 1 (auto-detect for YMF744/754 only)
2101 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
2103 rear_switch - enable shared rear/line-in switch (bool)
2105 This module supports autoprobe and multiple chips.
2107 The power-management is supported.
2109 Module snd-pdaudiocf
2110 --------------------
2112 Module for Sound Core PDAudioCF sound card.
2114 The power-management is supported.
2120 The ac97_quirk option is used to enable/override the workaround for
2121 specific devices on drivers for on-board AC'97 controllers like
2122 snd-intel8x0. Some hardware have swapped output pins between Master
2123 and Headphone, or Surround (thanks to confusion of AC'97
2124 specifications from version to version :-)
2126 The driver provides the auto-detection of known problematic devices,
2127 but some might be unknown or wrongly detected. In such a case, pass
2128 the proper value with this option.
2130 The following strings are accepted:
2131 - default Don't override the default setting
2132 - none Disable the quirk
2133 - hp_only Bind Master and Headphone controls as a single control
2134 - swap_hp Swap headphone and master controls
2135 - swap_surround Swap master and surround controls
2136 - ad_sharing For AD1985, turn on OMS bit and use headphone
2137 - alc_jack For ALC65x, turn on the jack sense mode
2138 - inv_eapd Inverted EAPD implementation
2139 - mute_led Bind EAPD bit for turning on/off mute LED
2141 For backward compatibility, the corresponding integer value -1, 0,
2142 ... are accepted, too.
2144 For example, if "Master" volume control has no effect on your device
2145 but only "Headphone" does, pass ac97_quirk=hp_only module option.
2148 Configuring Non-ISAPNP Cards
2149 ============================
2151 When the kernel is configured with ISA-PnP support, the modules
2152 supporting the isapnp cards will have module options "isapnp".
2153 If this option is set, *only* the ISA-PnP devices will be probed.
2154 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
2155 together with the proper i/o and irq configuration.
2157 When the kernel is configured without ISA-PnP support, isapnp option
2158 will be not built in.
2161 Module Autoloading Support
2162 ==========================
2164 The ALSA drivers can be loaded automatically on demand by defining
2165 module aliases. The string 'snd-card-%1' is requested for ALSA native
2166 devices where %i is sound card number from zero to seven.
2168 To auto-load an ALSA driver for OSS services, define the string
2169 'sound-slot-%i' where %i means the slot number for OSS, which
2170 corresponds to the card index of ALSA. Usually, define this
2171 as the same card module.
2173 An example configuration for a single emu10k1 card is like below:
2174 ----- /etc/modprobe.d/alsa.conf
2175 alias snd-card-0 snd-emu10k1
2176 alias sound-slot-0 snd-emu10k1
2177 ----- /etc/modprobe.d/alsa.conf
2179 The available number of auto-loaded sound cards depends on the module
2180 option "cards_limit" of snd module. As default it's set to 1.
2181 To enable the auto-loading of multiple cards, specify the number of
2182 sound cards in that option.
2184 When multiple cards are available, it'd better to specify the index
2185 number for each card via module option, too, so that the order of
2186 cards is kept consistent.
2188 An example configuration for two sound cards is like below:
2190 ----- /etc/modprobe.d/alsa.conf
2192 options snd cards_limit=2
2193 alias snd-card-0 snd-interwave
2194 alias snd-card-1 snd-ens1371
2195 options snd-interwave index=0
2196 options snd-ens1371 index=1
2198 alias sound-slot-0 snd-interwave
2199 alias sound-slot-1 snd-ens1371
2200 ----- /etc/modprobe.d/alsa.conf
2202 In this example, the interwave card is always loaded as the first card
2203 (index 0) and ens1371 as the second (index 1).
2205 Alternative (and new) way to fixate the slot assignment is to use
2206 "slots" option of snd module. In the case above, specify like the
2209 options snd slots=snd-interwave,snd-ens1371
2211 Then, the first slot (#0) is reserved for snd-interwave driver, and
2212 the second (#1) for snd-ens1371. You can omit index option in each
2213 driver if slots option is used (although you can still have them at
2214 the same time as long as they don't conflict).
2216 The slots option is especially useful for avoiding the possible
2217 hot-plugging and the resultant slot conflict. For example, in the
2218 case above again, the first two slots are already reserved. If any
2219 other driver (e.g. snd-usb-audio) is loaded before snd-interwave or
2220 snd-ens1371, it will be assigned to the third or later slot.
2222 When a module name is given with '!', the slot will be given for any
2223 modules but that name. For example, "slots=!snd-pcsp" will reserve
2224 the first slot for any modules but snd-pcsp.
2227 ALSA PCM devices to OSS devices mapping
2228 =======================================
2230 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
2231 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
2232 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
2233 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
2234 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
2235 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
2236 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
2237 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
2238 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
2240 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
2241 sound card number and second means device number. The ALSA devices
2242 have either 'c' or 'p' suffix indicating the direction, capture and
2243 playback, respectively.
2245 Please note that the device mapping above may be varied via the module
2246 options of snd-pcm-oss module.
2249 Proc interfaces (/proc/asound)
2250 ==============================
2252 /proc/asound/card#/pcm#[cp]/oss
2253 -------------------------------
2254 String "erase" - erase all additional information about OSS applications
2255 String "<app_name> <fragments> <fragment_size> [<options>]"
2257 <app_name> - name of application with (higher priority) or without path
2258 <fragments> - number of fragments or zero if auto
2259 <fragment_size> - size of fragment in bytes or zero if auto
2260 <options> - optional parameters
2261 - disable the application tries to open a pcm device for
2262 this channel but does not want to use it.
2263 (Cause a bug or mmap needs)
2264 It's good for Quake etc...
2265 - direct don't use plugins
2266 - block force block mode (rvplayer)
2267 - non-block force non-block mode
2268 - whole-frag write only whole fragments (optimization affecting
2270 - no-silence do not fill silence ahead to avoid clicks
2271 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
2272 instead of filled blocks
2274 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
2275 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
2276 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
2279 Early Buffer Allocation
2280 =======================
2282 Some drivers (e.g. hdsp) require the large contiguous buffers, and
2283 sometimes it's too late to find such spaces when the driver module is
2284 actually loaded due to memory fragmentation. You can pre-allocate the
2285 PCM buffers by loading snd-page-alloc module and write commands to its
2286 proc file in prior, for example, in the early boot stage like
2287 /etc/init.d/*.local scripts.
2289 Reading the proc file /proc/drivers/snd-page-alloc shows the current
2290 usage of page allocation. In writing, you can send the following
2291 commands to the snd-page-alloc driver:
2293 - add VENDOR DEVICE MASK SIZE BUFFERS
2295 VENDOR and DEVICE are PCI vendor and device IDs. They take
2296 integer numbers (0x prefix is needed for the hex).
2297 MASK is the PCI DMA mask. Pass 0 if not restricted.
2298 SIZE is the size of each buffer to allocate. You can pass
2299 k and m suffix for KB and MB. The max number is 16MB.
2300 BUFFERS is the number of buffers to allocate. It must be greater
2301 than 0. The max number is 4.
2305 This will erase the all pre-allocated buffers which are not in
2312 ALSA project homepage
2313 http://www.alsa-project.org
2316 http://bugzilla.kernel.org/
2319 mailto:alsa-devel@alsa-project.org
2322 http://www.alsa-project.org/alsa-info.sh
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob