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.
67 The PCM OSS emulation module.
68 This module takes options which change the mapping of devices.
70 dsp_map - PCM device number maps assigned to the 1st OSS device.
72 adsp_map - PCM device number maps assigned to the 2st OSS device.
75 - Don't block opening busy PCM devices. Default: 1
77 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
78 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
79 to PCM #0 of the card #0.
80 For changing the second or later card, specify the option with
81 commas, such like "dsp_map=0,1".
83 nonblock_open option is used to change the behavior of the PCM
84 regarding opening the device. When this option is non-zero,
85 opening a busy OSS PCM device won't be blocked but return
86 immediately with EAGAIN (just like O_NONBLOCK flag).
91 This module takes options which change the mapping of devices.
92 similar to those of the snd-pcm-oss module.
94 midi_map - MIDI device number maps assigned to the 1st OSS device.
96 amidi_map - MIDI device number maps assigned to the 2st OSS device.
99 Common parameters for top sound card modules
100 --------------------------------------------
102 Each of top level sound card module takes the following options.
104 index - index (slot #) of sound card
105 - Values: 0 through 31 or negative
106 - If nonnegative, assign that index number
107 - if negative, interpret as a bitmask of permissible
108 indices; the first free permitted index is assigned
110 id - card ID (identifier or name)
111 - Can be up to 15 characters long
112 - Default: the card type
113 - A directory by this name is created under /proc/asound/
114 containing information about the card
115 - This ID can be used instead of the index number in
118 - Default: enabled, for PCI and ISA PnP cards
123 Module for AdLib FM cards.
125 port - port # for OPL chip
127 This module supports multiple cards. It does not support autoprobe, so
128 the port must be specified. For actual AdLib FM cards it will be 0x388.
129 Note that this card does not have PCM support and no mixer; only FM
132 Make sure you have "sbiload" from the alsa-tools package available and,
133 after loading the module, find out the assigned ALSA sequencer port
134 number through "sbiload -l". Example output:
136 Port Client name Port name
137 64:0 OPL2 FM synth OPL2 FM Port
139 Load the std.sb and drums.sb patches also supplied by sbiload:
141 sbiload -p 64:0 std.sb drums.sb
143 If you use this driver to drive an OPL3, you can use std.o3 and drums.o3
144 instead. To have the card produce sound, use aplaymidi from alsa-utils:
146 aplaymidi -p 64:0 foo.mid
151 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
153 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
155 This module supports multiple cards, autoprobe and PnP.
160 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
162 port - port # for AD1848 chip
163 irq - IRQ # for AD1848 chip
164 dma1 - DMA # for AD1848 chip (0,1,3)
166 This module supports multiple cards. It does not support autoprobe
167 thus main port must be specified!!! Other ports are optional.
169 The power-management is supported.
174 Module for Analog Devices AD1889 chips.
176 ac97_quirk - AC'97 workaround for strange hardware
177 See the description of intel8x0 module for details.
179 This module supports multiple cards.
184 Module for ALi M5451 PCI chip.
186 pcm_channels - Number of hardware channels assigned for PCM
187 spdif - Support SPDIF I/O
190 This module supports one chip and autoprobe.
192 The power-management is supported.
197 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
199 This module supports multiple cards, autoprobe and PnP.
201 The power-management is supported.
206 Module for Avance Logic ALS300 and ALS300+
208 This module supports multiple cards.
210 The power-management is supported.
215 Module for sound cards based on Avance Logic ALS4000 PCI chip.
217 joystick_port - port # for legacy joystick support.
218 0 = disabled (default), 1 = auto-detect
220 This module supports multiple cards, autoprobe and PnP.
222 The power-management is supported.
227 Module for ATI IXP 150/200/250/400 AC97 controllers.
229 ac97_clock - AC'97 clock (default = 48000)
230 ac97_quirk - AC'97 workaround for strange hardware
231 See "AC97 Quirk Option" section below.
232 ac97_codec - Workaround to specify which AC'97 codec
233 instead of probing. If this works for you
234 file a bug with your `lspci -vn` output.
236 -1 -- Default behavior.
237 0-2 -- Use the specified codec.
238 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
240 This module supports one card and autoprobe.
242 ATI IXP has two different methods to control SPDIF output. One is
243 over AC-link and another is over the "direct" SPDIF output. The
244 implementation depends on the motherboard, and you'll need to
245 choose the correct one via spdif_aclink module option.
247 The power-management is supported.
249 Module snd-atiixp-modem
250 -----------------------
252 Module for ATI IXP 150/200/250 AC97 modem controllers.
254 This module supports one card and autoprobe.
256 Note: The default index value of this module is -2, i.e. the first
259 The power-management is supported.
261 Module snd-au8810, snd-au8820, snd-au8830
262 -----------------------------------------
264 Module for Aureal Vortex, Vortex2 and Advantage device.
266 pcifix - Control PCI workarounds
267 0 = Disable all workarounds
268 1 = Force the PCI latency of the Aureal card to 0xff
269 2 = Force the Extend PCI#2 Internal Master for Efficient
270 Handling of Dummy Requests on the VIA KT133 AGP Bridge
271 3 = Force both settings
272 255 = Autodetect what is required (default)
274 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
275 EQ, mpu401, gameport. A3D and wavetable support are still in development.
276 Development and reverse engineering work is being coordinated at
277 http://savannah.nongnu.org/projects/openvortex/
278 SPDIF output has a copy of the AC97 codec output, unless you use the
279 "spdif" pcm device, which allows raw data passthru.
280 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
283 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
284 control correctly. If you have problems regarding this, try
285 another ALSA compliant mixer (alsamixer works).
290 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
292 This module supports multiple cards, PnP and autoprobe.
294 The power-management is supported.
299 Module for sound cards based on Aztech AZF3328 PCI chip.
301 joystick - Enable joystick (default off)
303 This module supports multiple cards.
308 Module for video cards based on Bt87x chips.
310 digital_rate - Override the default digital rate (Hz)
311 load_all - Load the driver even if the card model isn't known
313 This module supports multiple cards.
315 Note: The default index value of this module is -2, i.e. the first
321 Module for Creative Audigy LS and SB Live 24bit
323 This module supports multiple cards.
329 Module for sound cards based on C-Media CMI8330 ISA chips.
331 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
333 with isapnp=0, the following options are available:
335 wssport - port # for CMI8330 chip (WSS)
336 wssirq - IRQ # for CMI8330 chip (WSS)
337 wssdma - first DMA # for CMI8330 chip (WSS)
338 sbport - port # for CMI8330 chip (SB16)
339 sbirq - IRQ # for CMI8330 chip (SB16)
340 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
341 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
343 This module supports multiple cards and autoprobe.
345 The power-management is supported.
350 Module for C-Media CMI8338/8738/8768/8770 PCI sound cards.
352 mpu_port - port address of MIDI interface (8338 only):
353 0x300,0x310,0x320,0x330 = legacy port,
354 0 = disable (default)
355 fm_port - port address of OPL-3 FM synthesizer (8x38 only):
357 1 = integrated PCI port (default on 8738),
359 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
361 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
363 This module supports autoprobe and multiple cards.
365 The power-management is supported.
370 Module for sound cards based on CS4231 ISA chips.
372 port - port # for CS4231 chip
373 mpu_port - port # for MPU-401 UART (optional), -1 = disable
374 irq - IRQ # for CS4231 chip
375 mpu_irq - IRQ # for MPU-401 UART
376 dma1 - first DMA # for CS4231 chip
377 dma2 - second DMA # for CS4231 chip
379 This module supports multiple cards. This module does not support autoprobe
380 thus main port must be specified!!! Other ports are optional.
382 The power-management is supported.
387 Module for sound cards based on CS4232/CS4232A ISA chips.
389 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
391 with isapnp=0, the following options are available:
393 port - port # for CS4232 chip (PnP setup - 0x534)
394 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
395 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
396 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
397 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
398 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
399 dma1 - first DMA # for CS4232 chip (0,1,3)
400 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
402 This module supports multiple cards. This module does not support autoprobe
403 (if ISA PnP is not used) thus main port must be specified!!! Other ports are
406 The power-management is supported.
411 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
412 CS4238B/CS4239 ISA chips.
414 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
416 with isapnp=0, the following options are available:
418 port - port # for CS4236 chip (PnP setup - 0x534)
419 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
420 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
421 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
422 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
423 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
424 dma1 - first DMA # for CS4236 chip (0,1,3)
425 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
427 This module supports multiple cards. This module does not support autoprobe
428 (if ISA PnP is not used) thus main port and control port must be
429 specified!!! Other ports are optional.
431 The power-management is supported.
436 Module for Cirrus Logic CS4281 soundchip.
438 dual_codec - Secondary codec ID (0 = disable, default)
440 This module supports multiple cards.
442 The power-management is supported.
447 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
448 CS4624/CS4630/CS4280 PCI chips.
450 external_amp - Force to enable external amplifier.
451 thinkpad - Force to enable Thinkpad's CLKRUN control.
452 mmap_valid - Support OSS mmap mode (default = 0).
454 This module supports multiple cards and autoprobe.
455 Usually external amp and CLKRUN controls are detected automatically
456 from PCI sub vendor/device ids. If they don't work, give the options
459 The power-management is supported.
464 Module for Cyrix/NatSemi Geode 5530 chip.
466 Module snd-cs5535audio
467 ----------------------
469 Module for multifunction CS5535 companion PCI device
471 The power-management is supported.
476 Module for Echoaudio Darla20
478 This module supports multiple cards.
479 The driver requires the firmware loader support on kernel.
484 Module for Echoaudio Darla24
486 This module supports multiple cards.
487 The driver requires the firmware loader support on kernel.
492 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
495 This module supports multiple cards. This module is enabled only with
498 The power-management is supported.
503 Module for the dummy sound card. This "card" doesn't do any output
504 or input, but you may use this module for any application which
505 requires a sound card (like RealPlayer).
507 The power-management is supported.
512 Module for Echoaudio 3G cards (Gina3G/Layla3G)
514 This module supports multiple cards.
515 The driver requires the firmware loader support on kernel.
520 Module for EMU10K1/EMU10k2 based PCI sound cards.
521 * Sound Blaster Live!
522 * Sound Blaster PCI 512
523 * Emu APS (partially supported)
524 * Sound Blaster Audigy
526 extin - bitmap of available external inputs for FX8010 (see bellow)
527 extout - bitmap of available external outputs for FX8010 (see bellow)
528 seq_ports - allocated sequencer ports (4 by default)
529 max_synth_voices - limit of voices used for wavetable (64 by default)
530 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
531 given in MB unit. Default value is 128.
532 enable_ir - enable IR
534 This module supports multiple cards and autoprobe.
536 Input & Output configurations [extin/extout]
537 * Creative Card wo/Digital out [0x0003/0x1f03]
538 * Creative Card w/Digital out [0x0003/0x1f0f]
539 * Creative Card w/Digital CD in [0x000f/0x1f0f]
540 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
541 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
542 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
543 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
544 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
545 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
546 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
547 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
548 * Creative Card all ins and outs [0x3fff/0x7fff]
550 The power-management is supported.
555 Module for Creative Emu10k1X (SB Live Dell OEM version)
557 This module supports multiple cards.
562 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
563 * SoundBlaster PCI 64
564 * SoundBlaster PCI 128
566 joystick - Enable joystick (default off)
568 This module supports multiple cards and autoprobe.
570 The power-management is supported.
575 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
576 * SoundBlaster PCI 64
577 * SoundBlaster PCI 128
578 * SoundBlaster Vibra PCI
580 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
581 0 = disable (default), 1 = auto-detect
583 This module supports multiple cards and autoprobe.
585 The power-management is supported.
590 Module for sound cards based on ESS ES968 chip (PnP only).
592 This module supports multiple cards, PnP and autoprobe.
594 The power-management is supported.
599 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
601 port - port # for ES-1688 chip (0x220,0x240,0x260)
602 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
603 irq - IRQ # for ES-1688 chip (5,7,9,10)
604 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
605 dma8 - DMA # for ES-1688 chip (0,1,3)
607 This module supports multiple cards and autoprobe (without MPU-401 port).
612 Module for ESS AudioDrive ES-18xx sound cards.
614 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
616 with isapnp=0, the following options are available:
618 port - port # for ES-18xx chip (0x220,0x240,0x260)
619 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
620 fm_port - port # for FM (optional, not used)
621 irq - IRQ # for ES-18xx chip (5,7,9,10)
622 dma1 - first DMA # for ES-18xx chip (0,1,3)
623 dma2 - first DMA # for ES-18xx chip (0,1,3)
625 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
626 port if native ISA PnP routines are not used).
627 When dma2 is equal with dma1, the driver works as half-duplex.
629 The power-management is supported.
634 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
636 This module supports multiple cards and autoprobe.
638 The power-management is supported.
643 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
645 total_bufsize - total buffer size in kB (1-4096kB)
646 pcm_substreams_p - playback channels (1-8, default=2)
647 pcm_substreams_c - capture channels (1-8, default=0)
648 clock - clock (0 = auto-detection)
649 use_pm - support the power-management (0 = off, 1 = on,
651 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
652 joystick - enable joystick (default off)
654 This module supports multiple cards and autoprobe.
656 The power-management is supported.
661 Module for ForteMedia FM801 based PCI sound cards.
663 tea575x_tuner - Enable TEA575x tuner
664 - 1 = MediaForte 256-PCS
665 - 2 = MediaForte 256-PCPR
666 - 3 = MediaForte 64-PCR
667 - High 16-bits are video (radio) device number + 1
668 - example: 0x10002 (MediaForte 256-PCPR, device 1)
670 This module supports multiple cards and autoprobe.
672 The power-management is supported.
677 Module for Echoaudio Gina20
679 This module supports multiple cards.
680 The driver requires the firmware loader support on kernel.
685 Module for Echoaudio Gina24
687 This module supports multiple cards.
688 The driver requires the firmware loader support on kernel.
690 Module snd-gusclassic
691 ---------------------
693 Module for Gravis UltraSound Classic sound card.
695 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
696 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
697 dma1 - DMA # for GF1 chip (1,3,5,6,7)
698 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
699 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
700 voices - GF1 voices limit (14-32)
701 pcm_voices - reserved PCM voices
703 This module supports multiple cards and autoprobe.
705 Module snd-gusextreme
706 ---------------------
708 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
710 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
711 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
712 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
713 irq - IRQ # for ES-1688 chip (5,7,9,10)
714 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
715 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
716 dma8 - DMA # for ES-1688 chip (0,1,3)
717 dma1 - DMA # for GF1 chip (1,3,5,6,7)
718 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
719 voices - GF1 voices limit (14-32)
720 pcm_voices - reserved PCM voices
722 This module supports multiple cards and autoprobe (without MPU-401 port).
727 Module for Gravis UltraSound MAX sound card.
729 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
730 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
731 dma1 - DMA # for GF1 chip (1,3,5,6,7)
732 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
733 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
734 voices - GF1 voices limit (14-32)
735 pcm_voices - reserved PCM voices
737 This module supports multiple cards and autoprobe.
742 Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8),
743 ATI SB450, SB600, RS600,
747 [Multiple options for each card instance]
748 model - force the model name
749 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
750 probe_mask - Bitmask to probe codecs (default = -1, meaning all slots)
752 [Single (global) options]
753 single_cmd - Use single immediate commands to communicate with
754 codecs (for debugging only)
755 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
756 power_save - Automatic power-saving timtout (in second, 0 =
758 power_save_controller - Reset HD-audio controller in power-saving mode
761 This module supports multiple cards and autoprobe.
763 Each codec may have a model table for different configurations.
764 If your machine isn't listed there, the default (usually minimal)
765 configuration is set up. You can pass "model=<name>" option to
766 specify a certain model in such a case. There are different
767 models depending on the codec chip.
769 Model name Description
770 ---------- -----------
772 3stack 3-jack in back and a headphone out
773 3stack-digout 3-jack in back, a HP out and a SPDIF out
774 5stack 5-jack in back, 2-jack in front
775 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
776 6stack 6-jack in back, 2-jack in front
777 6stack-digout 6-jack with a SPDIF out
779 z71v 3-jack (HP shared SPDIF)
780 asus 3-jack (ASUS Mobo)
782 asus-dig ASUS with SPDIF out
783 asus-dig2 ASUS with SPDIF out (using GPIO2)
785 fujitsu Fujitsu Laptops (Pi1536)
787 lg LG laptop (m1 express dual)
788 lg-lw LG LW20/LW25 laptop
790 clevo Clevo laptops (m520G, m665n)
791 test for testing/debugging purpose, almost all controls can be
792 adjusted. Appearing only when compiled with
794 auto auto-config reading BIOS (default)
798 hp-3013 HP machines (3013-variant)
799 fujitsu Fujitsu S7020
801 will Will laptops (PB V7900)
802 replacer Replacer 672V
803 basic fixed pin assignment (old default model)
804 test for testing/debugging purpose, almost all controls can
805 adjusted. Appearing only when compiled with
807 auto auto-config reading BIOS (default)
810 fujitsu Fujitsu Laptop
811 hp-bpc HP xw4400/6400/8400/9400 laptops
812 hp-bpc-d7000 HP BPC D7000
813 hp-tc-t5735 HP Thin Client T5735
817 hippo Hippo (ATI) with jack detection, Sony UX-90s
818 hippo_1 Hippo (Benq) with jack detection
819 sony-assamd Sony ASSAMD
820 ultra Samsung Q1 Ultra Vista model
821 basic fixed pin assignment w/o SPDIF
822 auto auto-config reading BIOS (default)
828 test for testing/debugging purpose, almost all controls can
829 adjusted. Appearing only when compiled with
831 auto auto-config reading BIOS (default)
834 3stack-dig 3-stack (2-channel) with SPDIF
835 3stack-6ch 3-stack (6-channel)
836 3stack-6ch-dig 3-stack (6-channel) with SPDIF
837 6stack-dig 6-stack with SPDIF
838 lenovo-101e Lenovo laptop
839 eeepc-p701 ASUS Eeepc P701
840 eeepc-ep20 ASUS Eeepc EP20
841 auto auto-config reading BIOS (default)
844 3stack-dig 3-jack with SPDIF I/O
845 6stack-dig 6-jack digital with SPDIF I/O
847 targa Targa T8, MSI-1049 T8
850 macpro MacPro support
851 mbp3 Macbook Pro rev3
852 imac24 iMac 24'' with jack detection
854 auto auto-config reading BIOS (default)
857 3stack-dig 3-jack with SPDIF I/O
858 6stack-dig 6-jack digital with SPDIF I/O
859 3stack-6ch 3-jack 6-channel
860 3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
861 6stack-dig-demo 6-jack digital for Intel demo board
862 acer Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
863 acer-aspire Acer Aspire 9810
864 medion Medion Laptops
865 medion-md2 Medion MD2
867 targa-2ch-dig Targs/MSI with 2-channel
868 laptop-eapd 3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
869 lenovo-101e Lenovo 101E
870 lenovo-nb0763 Lenovo NB0763
871 lenovo-ms7195-dig Lenovo MS7195
873 6stack-hp HP machines with 6stack (Nettle boards)
874 3stack-hp HP machines with 3stack (Lucknow, Samba boards)
876 auto auto-config reading BIOS (default)
880 3stack-dig 3-jack with SPDIF I/O
881 6stack-dig 6-jack with SPDIF I/O
882 3stack-660 3-jack (for ALC660)
883 uniwill-m31 Uniwill M31 laptop
884 toshiba Toshiba laptop support
885 asus Asus laptop support
886 asus-laptop ASUS F2/F3 laptops
887 auto auto-config reading BIOS (default)
891 3stack-dig 3-jack with SPDIF OUT
892 6stack-dig 6-jack with SPDIF OUT
893 3stack-660 3-jack (for ALC660VD)
894 3stack-660-digout 3-jack with SPDIF OUT (for ALC660VD)
895 lenovo Lenovo 3000 C200
896 dallas Dallas laptops
898 auto auto-config reading BIOS (default)
901 minimal 3-jack in back
902 min_fp 3-jack in back, 2-jack in front
903 full 6-jack in back, 2-jack in front
904 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
905 allout 5-jack in back, 2-jack in front, SPDIF out
906 auto auto-config reading BIOS (default)
909 3stack 3-stack mode (default)
916 basic 3-jack (default)
918 thinkpad Lenovo Thinkpad T60/X60/Z60
925 basic default configuration
926 thinkpad Lenovo Thinkpad T61/X61
929 6stack 6-jack, separate surrounds (default)
930 3stack 3-stack, shared surrounds
931 laptop 2-channel only (FSC V2060, Samsung M50)
932 laptop-eapd 2-channel with EAPD (Samsung R65, ASUS A6J)
933 laptop-automute 2-channel with EAPD and HP-automute (Lenovo N100)
934 ultra 2-channel with EAPD (Samsung Ultra tablet PC)
938 6stack-dig ditto with SPDIF
940 3stack-dig ditto with SPDIF
941 laptop 3-jack with hp-jack automute
942 laptop-dig ditto with SPDIF
943 auto auto-config reading BIOS (default)
947 test for testing/debugging purpose, almost all controls
948 can be adjusted. Appearing only when compiled with
952 laptop Basic Laptop config
953 laptop-hp Laptop config for some HP models (subdevice 30A5)
954 laptop-eapd Laptop config with EAPD support
955 test for testing/debugging purpose, almost all controls
956 can be adjusted. Appearing only when compiled with
961 dell-d21 Dell (unknown)
962 dell-d22 Dell (unknown)
963 dell-d23 Dell (unknown)
964 dell-m21 Dell Inspiron 630m, Dell Inspiron 640m
965 dell-m22 Dell Latitude D620, Dell Latitude D820
966 dell-m23 Dell XPS M1710, Dell Precision M90
967 dell-m24 Dell Latitude 120L
968 dell-m25 Dell Inspiron E1505n
969 dell-m26 Dell Inspiron 1501
970 dell-m27 Dell Inspiron E1705/9400
971 gateway Gateway laptops with EAPD control
975 dell-m42 Dell (unknown)
976 dell-m43 Dell Precision
977 dell-m44 Dell Inspiron
982 5stack D945 5stack + SPDIF
983 intel-mac-v1 Intel Mac Type 1
984 intel-mac-v2 Intel Mac Type 2
985 intel-mac-v3 Intel Mac Type 3
986 intel-mac-v4 Intel Mac Type 4
987 intel-mac-v5 Intel Mac Type 5
988 macmini Intel Mac Mini (equivalent with type 3)
989 macbook Intel Mac Book (eq. type 5)
990 macbook-pro-v1 Intel Mac Book Pro 1st generation (eq. type 3)
991 macbook-pro Intel Mac Book Pro 2nd generation (eq. type 3)
992 imac-intel Intel iMac (eq. type 2)
993 imac-intel-20 Intel iMac (newer version) (eq. type 3)
994 dell-d81 Dell (unknown)
995 dell-d82 Dell (unknown)
996 dell-m81 Dell (unknown)
997 dell-m82 Dell XPS M1210
1000 ref Reference board, base config
1001 m2-2 Some Gateway MX series laptops
1002 m6 Some Gateway NX series laptops
1003 pa6 Gateway NX860 series
1005 STAC9227/9228/9229/927x
1008 5stack D965 5stack + SPDIF
1009 dell-3stack Dell Dimension E520
1012 vaio Setup for VAIO FE550G/SZ110
1013 vaio-ar Setup for VAIO AR
1015 The model name "genric" is treated as a special case. When this
1016 model is given, the driver uses the generic codec parser without
1017 "codec-patch". It's sometimes good for testing and debugging.
1019 If the default configuration doesn't work and one of the above
1020 matches with your device, report it together with the PCI
1021 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
1022 ML (see the section "Links and Addresses").
1024 power_save and power_save_controller options are for power-saving
1025 mode. See powersave.txt for details.
1027 Note 2: If you get click noises on output, try the module option
1028 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
1029 register value without FIFO size correction as the current
1030 DMA pointer. position_fix=2 will make the driver to use
1031 the position buffer instead of reading SD_LPIB register.
1032 (Usually SD_LPLIB register is more accurate than the
1035 NB: If you get many "azx_get_response timeout" messages at
1036 loading, it's likely a problem of interrupts (e.g. ACPI irq
1037 routing). Try to boot with options like "pci=noacpi". Also, you
1038 can try "single_cmd=1" module option. This will switch the
1039 communication method between HDA controller and codecs to the
1040 single immediate commands instead of CORB/RIRB. Basically, the
1041 single command mode is provided only for BIOS, and you won't get
1042 unsolicited events, too. But, at least, this works independently
1043 from the irq. Remember this is a last resort, and should be
1044 avoided as much as possible...
1046 MORE NOTES ON "azx_get_response timeout" PROBLEMS:
1047 On some hardwares, you may need to add a proper probe_mask option
1048 to avoid the "azx_get_response timeout" problem above, instead.
1049 This occurs when the access to non-existing or non-working codec slot
1050 (likely a modem one) causes a stall of the communication via HD-audio
1051 bus. You can see which codec slots are probed by enabling
1052 CONFIG_SND_DEBUG_DETECT, or simply from the file name of the codec
1053 proc files. Then limit the slots to probe by probe_mask option.
1054 For example, probe_mask=1 means to probe only the first slot, and
1055 probe_mask=4 means only the third slot.
1057 The power-management is supported.
1062 Module for RME Hammerfall DSP audio interface(s)
1064 This module supports multiple cards.
1066 Note: The firmware data can be automatically loaded via hotplug
1067 when CONFIG_FW_LOADER is set. Otherwise, you need to load
1068 the firmware via hdsploader utility included in alsa-tools
1070 The firmware data is found in alsa-firmware package.
1072 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1073 module did formerly. It will allocate the buffers in advance
1074 when any HDSP cards are found. To make the buffer
1075 allocation sure, load snd-page-alloc module in the early
1076 stage of boot sequence. See "Early Buffer Allocation"
1082 Module for RME HDSP MADI board.
1084 precise_ptr - Enable precise pointer, or disable.
1085 line_outs_monitor - Send playback streams to analog outs by default.
1086 enable_monitor - Enable Analog Out on Channel 63/64 by default.
1088 See hdspm.txt for details.
1093 Module for Envy24 (ICE1712) based PCI sound cards.
1094 * MidiMan M Audio Delta 1010
1095 * MidiMan M Audio Delta 1010LT
1096 * MidiMan M Audio Delta DiO 2496
1097 * MidiMan M Audio Delta 66
1098 * MidiMan M Audio Delta 44
1099 * MidiMan M Audio Delta 410
1100 * MidiMan M Audio Audiophile 2496
1103 * TerraTec EWX 24/96
1104 * TerraTec DMX 6Fire
1106 * Hoontech SoundTrack DSP 24
1107 * Hoontech SoundTrack DSP 24 Value
1108 * Hoontech SoundTrack DSP 24 Media 7.1
1109 * Event Electronics, EZ8
1111 * Lionstracs, Mediastaton
1113 model - Use the given board model, one of the following:
1114 delta1010, dio2496, delta66, delta44, audiophile, delta410,
1115 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
1116 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
1117 phase88, mediastation
1118 omni - Omni I/O support for MidiMan M-Audio Delta44/66
1119 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transceiver)
1120 in msec resolution, default value is 500 (0.5 sec)
1122 This module supports multiple cards and autoprobe. Note: The consumer part
1123 is not used with all Envy24 based cards (for example in the MidiMan Delta
1126 Note: The supported board is detected by reading EEPROM or PCI
1127 SSID (if EEPROM isn't available). You can override the
1128 model by passing "model" module option in case that the
1129 driver isn't configured properly or you want to try another
1135 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
1136 * MidiMan M Audio Revolution 5.1
1137 * MidiMan M Audio Revolution 7.1
1138 * MidiMan M Audio Audiophile 192
1140 * TerraTec Aureon 5.1 Sky
1141 * TerraTec Aureon 7.1 Space
1142 * TerraTec Aureon 7.1 Universe
1145 * AudioTrak Prodigy 7.1
1146 * AudioTrak Prodigy 7.1LT
1147 * AudioTrak Prodigy 192
1149 * Albatron K8X800 Pro II
1150 * Chaintech ZNF3-150
1151 * Chaintech ZNF3-250
1158 model - Use the given board model, one of the following:
1159 revo51, revo71, amp2000, prodigy71, prodigy71lt,
1160 prodigy192, aureon51, aureon71, universe, ap192,
1161 k8x800, phase22, phase28, ms300, av710, se200pci,
1164 This module supports multiple cards and autoprobe.
1166 Note: The supported board is detected by reading EEPROM or PCI
1167 SSID (if EEPROM isn't available). You can override the
1168 model by passing "model" module option in case that the
1169 driver isn't configured properly or you want to try another
1175 Module for Echoaudio Indigo
1177 This module supports multiple cards.
1178 The driver requires the firmware loader support on kernel.
1183 Module for Echoaudio Indigo DJ
1185 This module supports multiple cards.
1186 The driver requires the firmware loader support on kernel.
1191 Module for Echoaudio Indigo IO
1193 This module supports multiple cards.
1194 The driver requires the firmware loader support on kernel.
1199 Module for AC'97 motherboards from Intel and compatibles.
1200 * Intel i810/810E, i815, i820, i830, i84x, MX440
1201 ICH5, ICH6, ICH7, ESB2
1202 * SiS 7012 (SiS 735)
1203 * NVidia NForce, NForce2, NForce3, MCP04, CK804
1205 * AMD AMD768, AMD8111
1208 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1209 ac97_quirk - AC'97 workaround for strange hardware
1210 See "AC97 Quirk Option" section below.
1211 buggy_irq - Enable workaround for buggy interrupts on some
1212 motherboards (default yes on nForce chips,
1214 buggy_semaphore - Enable workaround for hardwares with buggy
1215 semaphores (e.g. on some ASUS laptops)
1217 spdif_aclink - Use S/PDIF over AC-link instead of direct connection
1218 from the controller chip
1219 (0 = off, 1 = on, -1 = default)
1221 This module supports one chip and autoprobe.
1223 Note: the latest driver supports auto-detection of chip clock.
1224 if you still encounter too fast playback, specify the clock
1225 explicitly via the module option "ac97_clock=41194".
1227 Joystick/MIDI ports are not supported by this driver. If your
1228 motherboard has these devices, use the ns558 or snd-mpu401
1229 modules, respectively.
1231 The power-management is supported.
1233 Module snd-intel8x0m
1234 --------------------
1236 Module for Intel ICH (i8x0) chipset MC97 modems.
1237 * Intel i810/810E, i815, i820, i830, i84x, MX440
1239 * SiS 7013 (SiS 735)
1240 * NVidia NForce, NForce2, NForce2s, NForce3
1244 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1246 This module supports one card and autoprobe.
1248 Note: The default index value of this module is -2, i.e. the first
1251 The power-management is supported.
1253 Module snd-interwave
1254 --------------------
1256 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
1257 and other sound cards based on AMD InterWave (tm) chip.
1259 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1260 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1261 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1262 effect - 1 = InterWave effects enable (default 0);
1264 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1266 with isapnp=0, the following options are available:
1268 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1269 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1270 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1271 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1273 This module supports multiple cards, autoprobe and ISA PnP.
1275 Module snd-interwave-stb
1276 ------------------------
1278 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
1279 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
1280 circuit for extended control of bass, treble and master volume.
1282 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1283 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1284 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1285 effect - 1 = InterWave effects enable (default 0);
1287 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1289 with isapnp=0, the following options are available:
1291 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1292 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
1293 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1294 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1295 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1297 This module supports multiple cards, autoprobe and ISA PnP.
1302 Module for Korg 1212 IO PCI card
1304 This module supports multiple cards.
1309 Module for Echoaudio Layla20
1311 This module supports multiple cards.
1312 The driver requires the firmware loader support on kernel.
1317 Module for Echoaudio Layla24
1319 This module supports multiple cards.
1320 The driver requires the firmware loader support on kernel.
1325 Module for Allegro/Maestro3 chips
1327 external_amp - enable external amp (enabled by default)
1328 amp_gpio - GPIO pin number for external amp (0-15) or
1329 -1 for default pin (8 for allegro, 1 for
1332 This module supports autoprobe and multiple chips.
1334 Note: the binding of amplifier is dependent on hardware.
1335 If there is no sound even though all channels are unmuted, try to
1336 specify other gpio connection via amp_gpio option.
1337 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1340 The power-management is supported.
1345 Module for Echoaudio Mia
1347 This module supports multiple cards.
1348 The driver requires the firmware loader support on kernel.
1353 Module for Miro soundcards: miroSOUND PCM 1 pro,
1355 miroSOUND PCM 20 Radio.
1357 port - Port # (0x530,0x604,0xe80,0xf40)
1358 irq - IRQ # (5,7,9,10,11)
1359 dma1 - 1st dma # (0,1,3)
1360 dma2 - 2nd dma # (0,1)
1361 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1362 mpu_irq - MPU-401 irq # (5,7,9,10)
1363 fm_port - FM Port # (0x388)
1364 wss - enable WSS mode
1365 ide - enable onboard ide support
1370 Module for Digigram miXart8 sound cards.
1372 This module supports multiple cards.
1373 Note: One miXart8 board will be represented as 4 alsa cards.
1374 See MIXART.txt for details.
1376 When the driver is compiled as a module and the hotplug firmware
1377 is supported, the firmware data is loaded via hotplug automatically.
1378 Install the necessary firmware files in alsa-firmware package.
1379 When no hotplug fw loader is available, you need to load the
1380 firmware via mixartloader utility in alsa-tools package.
1385 Module for Echoaudio Mona
1387 This module supports multiple cards.
1388 The driver requires the firmware loader support on kernel.
1393 Module for MPU-401 UART devices.
1395 port - port number or -1 (disable)
1396 irq - IRQ number or -1 (disable)
1397 pnp - PnP detection - 0 = disable, 1 = enable (default)
1399 This module supports multiple devices and PnP.
1404 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1407 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1408 irq - IRQ # for MTPAV (7,5, default=7)
1409 hwports - number of supported hardware ports, default=8.
1411 Module supports only 1 card. This module has no enable option.
1416 Module for Ego Systems (ESI) Miditerminal 4140
1418 This module supports multiple devices.
1419 Requires parport (CONFIG_PARPORT).
1424 Module for NeoMagic NM256AV/ZX chips
1426 playback_bufsize - max playback frame size in kB (4-128kB)
1427 capture_bufsize - max capture frame size in kB (4-128kB)
1428 force_ac97 - 0 or 1 (disabled by default)
1429 buffer_top - specify buffer top address
1430 use_cache - 0 or 1 (disabled by default)
1431 vaio_hack - alias buffer_top=0x25a800
1432 reset_workaround - enable AC97 RESET workaround for some laptops
1433 reset_workaround2 - enable extended AC97 RESET workaround for some
1436 This module supports one chip and autoprobe.
1438 The power-management is supported.
1440 Note: on some notebooks the buffer address cannot be detected
1441 automatically, or causes hang-up during initialization.
1442 In such a case, specify the buffer top address explicitly via
1443 the buffer_top option.
1445 Sony F250: buffer_top=0x25a800
1446 Sony F270: buffer_top=0x272800
1447 The driver supports only ac97 codec. It's possible to force
1448 to initialize/use ac97 although it's not detected. In such a
1449 case, use force_ac97=1 option - but *NO* guarantee whether it
1452 Note: The NM256 chip can be linked internally with non-AC97
1453 codecs. This driver supports only the AC97 codec, and won't work
1454 with machines with other (most likely CS423x or OPL3SAx) chips,
1455 even though the device is detected in lspci. In such a case, try
1456 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1457 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1458 and proper hardware parameters in the case without ISA PnP.
1460 Note: some laptops need a workaround for AC97 RESET. For the
1461 known hardware like Dell Latitude LS and Sony PCG-F305, this
1462 workaround is enabled automatically. For other laptops with a
1463 hard freeze, you can try reset_workaround=1 option.
1465 Note: Dell Latitude CSx laptops have another problem regarding
1466 AC97 RESET. On these laptops, reset_workaround2 option is
1467 turned on as default. This option is worth to try if the
1468 previous reset_workaround option doesn't help.
1470 Note: This driver is really crappy. It's a porting from the
1471 OSS driver, which is a result of black-magic reverse engineering.
1472 The detection of codec will fail if the driver is loaded *after*
1473 X-server as described above. You might be able to force to load
1474 the module, but it may result in hang-up. Hence, make sure that
1475 you load this module *before* X if you encounter this kind of
1481 Module for Yamaha OPL3-SA2/SA3 sound cards.
1483 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1485 with isapnp=0, the following options are available:
1487 port - control port # for OPL3-SA chip (0x370)
1488 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1489 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1490 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1491 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1492 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1493 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1494 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1496 This module supports multiple cards and ISA PnP. It does not support
1497 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1499 The power-management is supported.
1501 Module snd-opti92x-ad1848
1502 -------------------------
1504 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1505 Module works with OAK Mozart cards as well.
1507 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1509 with isapnp=0, the following options are available:
1511 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1512 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1513 fm_port - port # for OPL3 device (0x388)
1514 irq - IRQ # for WSS chip (5,7,9,10,11)
1515 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1516 dma1 - first DMA # for WSS chip (0,1,3)
1518 This module supports only one card, autoprobe and PnP.
1520 Module snd-opti92x-cs4231
1521 -------------------------
1523 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1525 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1527 with isapnp=0, the following options are available:
1529 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1530 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1531 fm_port - port # for OPL3 device (0x388)
1532 irq - IRQ # for WSS chip (5,7,9,10,11)
1533 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1534 dma1 - first DMA # for WSS chip (0,1,3)
1535 dma2 - second DMA # for WSS chip (0,1,3)
1537 This module supports only one card, autoprobe and PnP.
1542 Module for sound cards based on OPTi 82c93x chips.
1544 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1546 with isapnp=0, the following options are available:
1548 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1549 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1550 fm_port - port # for OPL3 device (0x388)
1551 irq - IRQ # for WSS chip (5,7,9,10,11)
1552 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1553 dma1 - first DMA # for WSS chip (0,1,3)
1554 dma2 - second DMA # for WSS chip (0,1,3)
1556 This module supports only one card, autoprobe and PnP.
1561 Module for Digigram PCXHR boards
1563 This module supports multiple cards.
1565 Module snd-portman2x4
1566 ---------------------
1568 Module for Midiman Portman 2x4 parallel port MIDI interface
1570 This module supports multiple cards.
1572 Module snd-powermac (on ppc only)
1573 ---------------------------------
1575 Module for PowerMac, iMac and iBook on-board soundchips
1577 enable_beep - enable beep using PCM (enabled as default)
1579 Module supports autoprobe a chip.
1581 Note: the driver may have problems regarding endianess.
1583 The power-management is supported.
1585 Module snd-pxa2xx-ac97 (on arm only)
1586 ------------------------------------
1588 Module for AC97 driver for the Intel PXA2xx chip
1590 For ARM architecture only.
1592 The power-management is supported.
1597 Module for Conexant Riptide chip
1599 joystick_port - Joystick port # (default: 0x200)
1600 mpu_port - MPU401 port # (default: 0x330)
1601 opl3_port - OPL3 port # (default: 0x388)
1603 This module supports multiple cards.
1604 The driver requires the firmware loader support on kernel.
1605 You need to install the firmware file "riptide.hex" to the standard
1606 firmware path (e.g. /lib/firmware).
1611 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1612 Prodif96 and Prodif Gold) sound cards.
1614 This module supports multiple cards.
1619 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1621 This module supports multiple cards.
1626 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1628 precise_ptr - Enable precise pointer (doesn't work reliably).
1631 This module supports multiple cards.
1633 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1634 module did formerly. It will allocate the buffers in advance
1635 when any RME9652 cards are found. To make the buffer
1636 allocation sure, load snd-page-alloc module in the early
1637 stage of boot sequence. See "Early Buffer Allocation"
1640 Module snd-sa11xx-uda1341 (on arm only)
1641 ---------------------------------------
1643 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1645 Module supports only one card.
1646 Module has no enable and index options.
1648 The power-management is supported.
1653 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1657 port - port # for SB DSP chip (0x220,0x240,0x260)
1658 irq - IRQ # for SB DSP chip (5,7,9,10)
1659 dma8 - DMA # for SB DSP chip (1,3)
1661 This module supports multiple cards and autoprobe.
1663 The power-management is supported.
1665 Module snd-sb16 and snd-sbawe
1666 -----------------------------
1668 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1669 SoundBlaster AWE 32 (PnP),
1670 SoundBlaster AWE 64 PnP
1672 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1673 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1674 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1676 with isapnp=0, the following options are available:
1678 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1679 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1680 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1681 (snd-sbawe module only)
1682 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1683 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1684 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1686 This module supports multiple cards, autoprobe and ISA PnP.
1688 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1689 disable 16bit DMA with dma16 = -1 module parameter.
1690 Also, all Sound Blaster 16 type cards can operate in 16-bit
1691 half duplex mode through 8-bit DMA channel by disabling their
1694 The power-management is supported.
1699 Module for Gallant SC-6000 soundcard.
1701 port - Port # (0x220 or 0x240)
1702 mss_port - MSS Port # (0x530 or 0xe80)
1703 irq - IRQ # (5,7,9,10,11)
1704 mpu_irq - MPU-401 IRQ # (5,7,9,10) ,0 - no MPU-401 irq
1707 This module supports multiple cards.
1709 This card is also known as Audio Excel DSP 16 or Zoltrix AV302.
1714 Module for Aztech Sound Galaxy sound card.
1716 sbport - Port # for SB16 interface (0x220,0x240)
1717 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1718 irq - IRQ # (7,9,10,11)
1721 This module supports multiple cards.
1723 The power-management is supported.
1728 Module for ENSONIQ SoundScape PnP cards.
1730 port - Port # (PnP setup)
1731 wss_port - WSS Port # (PnP setup)
1732 irq - IRQ # (PnP setup)
1733 mpu_irq - MPU-401 IRQ # (PnP setup)
1734 dma - DMA # (PnP setup)
1735 dma2 - 2nd DMA # (PnP setup, -1 to disable)
1737 This module supports multiple cards. ISA PnP must be enabled.
1738 You need sscape_ctl tool in alsa-tools package for loading
1741 Module snd-sun-amd7930 (on sparc only)
1742 --------------------------------------
1744 Module for AMD7930 sound chips found on Sparcs.
1746 This module supports multiple cards.
1748 Module snd-sun-cs4231 (on sparc only)
1749 -------------------------------------
1751 Module for CS4231 sound chips found on Sparcs.
1753 This module supports multiple cards.
1755 Module snd-sun-dbri (on sparc only)
1756 -----------------------------------
1758 Module for DBRI sound chips found on Sparcs.
1760 This module supports multiple cards.
1762 Module snd-wavefront
1763 --------------------
1765 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1767 use_cs4232_midi - Use CS4232 MPU-401 interface
1768 (inaccessibly located inside your computer)
1769 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1771 with isapnp=0, the following options are available:
1773 cs4232_pcm_port - Port # for CS4232 PCM interface.
1774 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1775 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1776 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1777 ics2115_port - Port # for ICS2115
1778 ics2115_irq - IRQ # for ICS2115
1779 fm_port - FM OPL-3 Port #
1780 dma1 - DMA1 # for CS4232 PCM interface.
1781 dma2 - DMA2 # for CS4232 PCM interface.
1783 The below are options for wavefront_synth features:
1784 wf_raw - Assume that we need to boot the OS (default:no)
1785 If yes, then during driver loading, the state of the board is
1786 ignored, and we reset the board and load the firmware anyway.
1787 fx_raw - Assume that the FX process needs help (default:yes)
1788 If false, we'll leave the FX processor in whatever state it is
1789 when the driver is loaded. The default is to download the
1790 microprogram and associated coefficients to set it up for
1791 "default" operation, whatever that means.
1792 debug_default - Debug parameters for card initialization
1793 wait_usecs - How long to wait without sleeping, usecs
1795 This magic number seems to give pretty optimal throughput
1796 based on my limited experimentation.
1797 If you want to play around with it and find a better value, be
1798 my guest. Remember, the idea is to get a number that causes us
1799 to just busy wait for as many WaveFront commands as possible,
1800 without coming up with a number so large that we hog the whole
1802 Specifically, with this number, out of about 134,000 status
1803 waits, only about 250 result in a sleep.
1804 sleep_interval - How long to sleep when waiting for reply
1806 sleep_tries - How many times to try sleeping during a wait
1808 ospath - Pathname to processed ICS2115 OS firmware
1809 (default:wavefront.os)
1810 The path name of the ISC2115 OS firmware. In the recent
1811 version, it's handled via firmware loader framework, so it
1812 must be installed in the proper path, typically,
1814 reset_time - How long to wait for a reset to take effect
1816 ramcheck_time - How many seconds to wait for the RAM test
1818 osrun_time - How many seconds to wait for the ICS2115 OS
1821 This module supports multiple cards and ISA PnP.
1823 Note: the firmware file "wavefront.os" was located in the earlier
1824 version in /etc. Now it's loaded via firmware loader, and
1825 must be in the proper firmware path, such as /lib/firmware.
1826 Copy (or symlink) the file appropriately if you get an error
1827 regarding firmware downloading after upgrading the kernel.
1829 Module snd-sonicvibes
1830 ---------------------
1832 Module for S3 SonicVibes PCI sound cards.
1833 * PINE Schubert 32 PCI
1835 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1836 - SoundCard must have onboard SRAM for this.
1837 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1839 This module supports multiple cards and autoprobe.
1841 Module snd-serial-u16550
1842 ------------------------
1844 Module for UART16550A serial MIDI ports.
1846 port - port # for UART16550A chip
1847 irq - IRQ # for UART16550A chip, -1 = poll mode
1848 speed - speed in bauds (9600,19200,38400,57600,115200)
1850 base - base for divisor in bauds (57600,115200,230400,460800)
1852 outs - number of MIDI ports in a serial port (1-4)
1854 adaptor - Type of adaptor.
1855 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1856 3 = MS-124W M/B, 4 = Generic
1858 This module supports multiple cards. This module does not support autoprobe
1859 thus the main port must be specified!!! Other options are optional.
1864 Module for Trident 4DWave DX/NX sound cards.
1865 * Best Union Miss Melody 4DWave PCI
1867 * Warpspeed ONSpeed 4DWave PCI
1870 * CHIC True Sound 4Dwave
1871 * Shark Predator4D-PCI
1872 * Jaton SonicWave 4D
1874 pcm_channels - max channels (voices) reserved for PCM
1875 wavetable_size - max wavetable size in kB (4-?kb)
1877 This module supports multiple cards and autoprobe.
1879 The power-management is supported.
1881 Module snd-usb-audio
1882 --------------------
1884 Module for USB audio and USB MIDI devices.
1886 vid - Vendor ID for the device (optional)
1887 pid - Product ID for the device (optional)
1888 device_setup - Device specific magic number (optional)
1889 - Influence depends on the device
1892 This module supports multiple devices, autoprobe and hotplugging.
1894 Module snd-usb-caiaq
1895 --------------------
1897 Module for caiaq UB audio interfaces,
1898 * Native Instruments RigKontrol2
1899 * Native Instruments Kore Controller
1900 * Native Instruments Audio Kontrol 1
1901 * Native Instruments Audio 8 DJ
1903 This module supports multiple devices, autoprobe and hotplugging.
1905 Module snd-usb-usx2y
1906 --------------------
1908 Module for Tascam USB US-122, US-224 and US-428 devices.
1910 This module supports multiple devices, autoprobe and hotplugging.
1912 Note: you need to load the firmware via usx2yloader utility included
1913 in alsa-tools and alsa-firmware packages.
1918 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1919 8233A, 8233C, 8235, 8237 (south) bridge.
1921 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1923 joystick - Enable joystick (default off) [VIA686A/686B only]
1924 ac97_clock - AC'97 codec clock base (default 48000Hz)
1925 dxs_support - support DXS channels,
1926 0 = auto (default), 1 = enable, 2 = disable,
1927 3 = 48k only, 4 = no VRA, 5 = enable any sample
1928 rate and different sample rates on different
1930 [VIA8233/C, 8235, 8237 only]
1931 ac97_quirk - AC'97 workaround for strange hardware
1932 See "AC97 Quirk Option" section below.
1934 This module supports one chip and autoprobe.
1936 Note: on some SMP motherboards like MSI 694D the interrupts might
1937 not be generated properly. In such a case, please try to
1938 set the SMP (or MPS) version on BIOS to 1.1 instead of
1939 default value 1.4. Then the interrupt number will be
1940 assigned under 15. You might also upgrade your BIOS.
1942 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1943 channels as the first PCM. On these channels, up to 4
1944 streams can be played at the same time, and the controller
1945 can perform sample rate conversion with separate rates for
1947 As default (dxs_support = 0), 48k fixed rate is chosen
1948 except for the known devices since the output is often
1949 noisy except for 48k on some mother boards due to the
1951 Please try once dxs_support=5 and if it works on other
1952 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1953 know the PCI subsystem vendor/device id's (output of
1955 If dxs_support=5 does not work, try dxs_support=4; if it
1956 doesn't work too, try dxs_support=1. (dxs_support=1 is
1957 usually for old motherboards. The correct implemented
1958 board should work with 4 or 5.) If it still doesn't
1959 work and the default setting is ok, dxs_support=3 is the
1960 right choice. If the default setting doesn't work at all,
1961 try dxs_support=2 to disable the DXS channels.
1962 In any cases, please let us know the result and the
1963 subsystem vendor/device ids. See "Links and Addresses"
1966 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1967 additionally. The mpu_port option is for VIA686 chips only.
1969 The power-management is supported.
1971 Module snd-via82xx-modem
1972 ------------------------
1974 Module for VIA82xx AC97 modem
1976 ac97_clock - AC'97 codec clock base (default 48000Hz)
1978 This module supports one card and autoprobe.
1980 Note: The default index value of this module is -2, i.e. the first
1983 The power-management is supported.
1988 Module for virtual rawmidi devices.
1989 This module creates virtual rawmidi devices which communicate
1990 to the corresponding ALSA sequencer ports.
1992 midi_devs - MIDI devices # (1-4, default=4)
1994 This module supports multiple cards.
1999 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
2001 mic - Enable Microphone on V222 Mic (NYI)
2002 ibl - Capture IBL size. (default = 0, minimum size)
2004 This module supports multiple cards.
2006 When the driver is compiled as a module and the hotplug firmware
2007 is supported, the firmware data is loaded via hotplug automatically.
2008 Install the necessary firmware files in alsa-firmware package.
2009 When no hotplug fw loader is available, you need to load the
2010 firmware via vxloader utility in alsa-tools package. To invoke
2011 vxloader automatically, add the following to /etc/modprobe.conf
2013 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
2015 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
2016 /etc/modules.conf, instead.)
2017 IBL size defines the interrupts period for PCM. The smaller size
2018 gives smaller latency but leads to more CPU consumption, too.
2019 The size is usually aligned to 126. As default (=0), the smallest
2020 size is chosen. The possible IBL values can be found in
2021 /proc/asound/cardX/vx-status proc file.
2023 The power-management is supported.
2028 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
2030 ibl - Capture IBL size. (default = 0, minimum size)
2032 This module supports multiple cards. The module is compiled only when
2033 PCMCIA is supported on kernel.
2035 With the older 2.6.x kernel, to activate the driver via the card
2036 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
2037 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
2038 longer require a config file.
2040 When the driver is compiled as a module and the hotplug firmware
2041 is supported, the firmware data is loaded via hotplug automatically.
2042 Install the necessary firmware files in alsa-firmware package.
2043 When no hotplug fw loader is available, you need to load the
2044 firmware via vxloader utility in alsa-tools package.
2046 About capture IBL, see the description of snd-vx222 module.
2048 Note: snd-vxp440 driver is merged to snd-vxpocket driver since
2051 The power-management is supported.
2056 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
2058 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
2059 1 (auto-detect for YMF744/754 only)
2060 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
2061 1 (auto-detect for YMF744/754 only)
2062 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
2064 rear_switch - enable shared rear/line-in switch (bool)
2066 This module supports autoprobe and multiple chips.
2068 The power-management is supported.
2070 Module snd-pdaudiocf
2071 --------------------
2073 Module for Sound Core PDAudioCF sound card.
2075 The power-management is supported.
2081 The ac97_quirk option is used to enable/override the workaround for
2082 specific devices on drivers for on-board AC'97 controllers like
2083 snd-intel8x0. Some hardware have swapped output pins between Master
2084 and Headphone, or Surround (thanks to confusion of AC'97
2085 specifications from version to version :-)
2087 The driver provides the auto-detection of known problematic devices,
2088 but some might be unknown or wrongly detected. In such a case, pass
2089 the proper value with this option.
2091 The following strings are accepted:
2092 - default Don't override the default setting
2093 - none Disable the quirk
2094 - hp_only Bind Master and Headphone controls as a single control
2095 - swap_hp Swap headphone and master controls
2096 - swap_surround Swap master and surround controls
2097 - ad_sharing For AD1985, turn on OMS bit and use headphone
2098 - alc_jack For ALC65x, turn on the jack sense mode
2099 - inv_eapd Inverted EAPD implementation
2100 - mute_led Bind EAPD bit for turning on/off mute LED
2102 For backward compatibility, the corresponding integer value -1, 0,
2103 ... are accepted, too.
2105 For example, if "Master" volume control has no effect on your device
2106 but only "Headphone" does, pass ac97_quirk=hp_only module option.
2109 Configuring Non-ISAPNP Cards
2110 ============================
2112 When the kernel is configured with ISA-PnP support, the modules
2113 supporting the isapnp cards will have module options "isapnp".
2114 If this option is set, *only* the ISA-PnP devices will be probed.
2115 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
2116 together with the proper i/o and irq configuration.
2118 When the kernel is configured without ISA-PnP support, isapnp option
2119 will be not built in.
2122 Module Autoloading Support
2123 ==========================
2125 The ALSA drivers can be loaded automatically on demand by defining
2126 module aliases. The string 'snd-card-%1' is requested for ALSA native
2127 devices where %i is sound card number from zero to seven.
2129 To auto-load an ALSA driver for OSS services, define the string
2130 'sound-slot-%i' where %i means the slot number for OSS, which
2131 corresponds to the card index of ALSA. Usually, define this
2132 as the same card module.
2134 An example configuration for a single emu10k1 card is like below:
2135 ----- /etc/modprobe.conf
2136 alias snd-card-0 snd-emu10k1
2137 alias sound-slot-0 snd-emu10k1
2138 ----- /etc/modprobe.conf
2140 The available number of auto-loaded sound cards depends on the module
2141 option "cards_limit" of snd module. As default it's set to 1.
2142 To enable the auto-loading of multiple cards, specify the number of
2143 sound cards in that option.
2145 When multiple cards are available, it'd better to specify the index
2146 number for each card via module option, too, so that the order of
2147 cards is kept consistent.
2149 An example configuration for two sound cards is like below:
2151 ----- /etc/modprobe.conf
2153 options snd cards_limit=2
2154 alias snd-card-0 snd-interwave
2155 alias snd-card-1 snd-ens1371
2156 options snd-interwave index=0
2157 options snd-ens1371 index=1
2159 alias sound-slot-0 snd-interwave
2160 alias sound-slot-1 snd-ens1371
2161 ----- /etc/modprobe.conf
2163 In this example, the interwave card is always loaded as the first card
2164 (index 0) and ens1371 as the second (index 1).
2166 Alternative (and new) way to fixate the slot assignment is to use
2167 "slots" option of snd module. In the case above, specify like the
2170 options snd slots=snd-interwave,snd-ens1371
2172 Then, the first slot (#0) is reserved for snd-interwave driver, and
2173 the second (#1) for snd-ens1371. You can omit index option in each
2174 driver if slots option is used (although you can still have them at
2175 the same time as long as they don't conflict).
2177 The slots option is especially useful for avoiding the possible
2178 hot-plugging and the resultant slot conflict. For example, in the
2179 case above again, the first two slots are already reserved. If any
2180 other driver (e.g. snd-usb-audio) is loaded before snd-interwave or
2181 snd-ens1371, it will be assigned to the third or later slot.
2184 ALSA PCM devices to OSS devices mapping
2185 =======================================
2187 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
2188 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
2189 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
2190 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
2191 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
2192 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
2193 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
2194 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
2195 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
2197 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
2198 sound card number and second means device number. The ALSA devices
2199 have either 'c' or 'p' suffix indicating the direction, capture and
2200 playback, respectively.
2202 Please note that the device mapping above may be varied via the module
2203 options of snd-pcm-oss module.
2206 Proc interfaces (/proc/asound)
2207 ==============================
2209 /proc/asound/card#/pcm#[cp]/oss
2210 -------------------------------
2211 String "erase" - erase all additional informations about OSS applications
2212 String "<app_name> <fragments> <fragment_size> [<options>]"
2214 <app_name> - name of application with (higher priority) or without path
2215 <fragments> - number of fragments or zero if auto
2216 <fragment_size> - size of fragment in bytes or zero if auto
2217 <options> - optional parameters
2218 - disable the application tries to open a pcm device for
2219 this channel but does not want to use it.
2220 (Cause a bug or mmap needs)
2221 It's good for Quake etc...
2222 - direct don't use plugins
2223 - block force block mode (rvplayer)
2224 - non-block force non-block mode
2225 - whole-frag write only whole fragments (optimization affecting
2227 - no-silence do not fill silence ahead to avoid clicks
2228 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
2229 instead of filled blocks
2231 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
2232 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
2233 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
2236 Early Buffer Allocation
2237 =======================
2239 Some drivers (e.g. hdsp) require the large contiguous buffers, and
2240 sometimes it's too late to find such spaces when the driver module is
2241 actually loaded due to memory fragmentation. You can pre-allocate the
2242 PCM buffers by loading snd-page-alloc module and write commands to its
2243 proc file in prior, for example, in the early boot stage like
2244 /etc/init.d/*.local scripts.
2246 Reading the proc file /proc/drivers/snd-page-alloc shows the current
2247 usage of page allocation. In writing, you can send the following
2248 commands to the snd-page-alloc driver:
2250 - add VENDOR DEVICE MASK SIZE BUFFERS
2252 VENDOR and DEVICE are PCI vendor and device IDs. They take
2253 integer numbers (0x prefix is needed for the hex).
2254 MASK is the PCI DMA mask. Pass 0 if not restricted.
2255 SIZE is the size of each buffer to allocate. You can pass
2256 k and m suffix for KB and MB. The max number is 16MB.
2257 BUFFERS is the number of buffers to allocate. It must be greater
2258 than 0. The max number is 4.
2262 This will erase the all pre-allocated buffers which are not in
2269 ALSA project homepage
2270 http://www.alsa-project.org
2272 ALSA Bug Tracking System
2273 https://bugtrack.alsa-project.org/bugs/
2276 mailto:alsa-devel@alsa-project.org
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