11da177e4SLinus Torvalds# ALSA soundcard-configuration 21da177e4SLinus Torvaldsconfig SND_TIMER 31da177e4SLinus Torvalds tristate 41da177e4SLinus Torvalds 51da177e4SLinus Torvaldsconfig SND_PCM 61da177e4SLinus Torvalds tristate 790bbaf66SJie Yang select SND_TIMER if SND_PCM_TIMER 81da177e4SLinus Torvalds 9838d1631SRussell Kingconfig SND_PCM_ELD 10838d1631SRussell King bool 11838d1631SRussell King 129203dd01SRussell Kingconfig SND_PCM_IEC958 139203dd01SRussell King bool 149203dd01SRussell King 15b7ae6f31SDaniel Mackconfig SND_DMAENGINE_PCM 16903eb318SDaniel Mack tristate 17b7ae6f31SDaniel Mack 181da177e4SLinus Torvaldsconfig SND_HWDEP 191da177e4SLinus Torvalds tristate 201da177e4SLinus Torvalds 211da177e4SLinus Torvaldsconfig SND_RAWMIDI 221da177e4SLinus Torvalds tristate 231da177e4SLinus Torvalds 245c845bebSTakashi Iwaiconfig SND_COMPRESS_OFFLOAD 255c845bebSTakashi Iwai tristate 265c845bebSTakashi Iwai 270d94e41aSMark Brownconfig SND_JACK 280d94e41aSMark Brown bool 290d94e41aSMark Brown 30fe0d128cSTakashi Iwai# enable input device support in jack layer 31fe0d128cSTakashi Iwaiconfig SND_JACK_INPUT_DEV 32fe0d128cSTakashi Iwai bool 33fe0d128cSTakashi Iwai depends on SND_JACK 34fe0d128cSTakashi Iwai default y if INPUT=y || INPUT=SND 35fe0d128cSTakashi Iwai 361da177e4SLinus Torvaldsconfig SND_SEQUENCER 371da177e4SLinus Torvalds tristate "Sequencer support" 381da177e4SLinus Torvalds select SND_TIMER 391da177e4SLinus Torvalds help 401da177e4SLinus Torvalds Say Y or M to enable MIDI sequencer and router support. This 411da177e4SLinus Torvalds feature allows routing and enqueueing of MIDI events. Events 421da177e4SLinus Torvalds can be processed at a given time. 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds Many programs require this feature, so you should enable it 451da177e4SLinus Torvalds unless you know what you're doing. 461da177e4SLinus Torvalds 471da177e4SLinus Torvaldsconfig SND_SEQ_DUMMY 481da177e4SLinus Torvalds tristate "Sequencer dummy client" 491da177e4SLinus Torvalds depends on SND_SEQUENCER 501da177e4SLinus Torvalds help 511da177e4SLinus Torvalds Say Y here to enable the dummy sequencer client. This client 521da177e4SLinus Torvalds is a simple MIDI-through client: all normal input events are 531da177e4SLinus Torvalds redirected to the output port immediately. 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds You don't need this unless you want to connect many MIDI 561da177e4SLinus Torvalds devices or applications together. 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 591da177e4SLinus Torvalds will be called snd-seq-dummy. 601da177e4SLinus Torvalds 611da177e4SLinus Torvaldsconfig SND_OSSEMUL 62eb3b705aSTakashi Iwai bool "Enable OSS Emulation" 63d886e87cSTejun Heo select SOUND_OSS_CORE 64eb3b705aSTakashi Iwai help 65eb3b705aSTakashi Iwai This option enables the build of OSS emulation layer. 661da177e4SLinus Torvalds 671da177e4SLinus Torvaldsconfig SND_MIXER_OSS 681da177e4SLinus Torvalds tristate "OSS Mixer API" 69eb3b705aSTakashi Iwai depends on SND_OSSEMUL 701da177e4SLinus Torvalds help 711da177e4SLinus Torvalds To enable OSS mixer API emulation (/dev/mixer*), say Y here 721da177e4SLinus Torvalds and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 771da177e4SLinus Torvalds will be called snd-mixer-oss. 781da177e4SLinus Torvalds 791da177e4SLinus Torvaldsconfig SND_PCM_OSS 801da177e4SLinus Torvalds tristate "OSS PCM (digital audio) API" 81eb3b705aSTakashi Iwai depends on SND_OSSEMUL 821da177e4SLinus Torvalds select SND_PCM 831da177e4SLinus Torvalds help 841da177e4SLinus Torvalds To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y 851da177e4SLinus Torvalds here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 901da177e4SLinus Torvalds will be called snd-pcm-oss. 911da177e4SLinus Torvalds 9221a3479aSJaroslav Kyselaconfig SND_PCM_OSS_PLUGINS 9321a3479aSJaroslav Kysela bool "OSS PCM (digital audio) API - Include plugin system" 9421a3479aSJaroslav Kysela depends on SND_PCM_OSS 9521a3479aSJaroslav Kysela default y 9621a3479aSJaroslav Kysela help 9721a3479aSJaroslav Kysela If you disable this option, the ALSA's OSS PCM API will not 9821a3479aSJaroslav Kysela support conversion of channels, formats and rates. It will 9921a3479aSJaroslav Kysela behave like most of new OSS/Free drivers in 2.4/2.6 kernels. 10021a3479aSJaroslav Kysela 10190bbaf66SJie Yangconfig SND_PCM_TIMER 10290bbaf66SJie Yang bool "PCM timer interface" if EXPERT 10390bbaf66SJie Yang default y 10490bbaf66SJie Yang help 105ac1efcfbSRandy Dunlap If you disable this option, pcm timer will be unavailable, so 106ac1efcfbSRandy Dunlap those stubs that use pcm timer (e.g. dmix, dsnoop & co) may work 10790bbaf66SJie Yang incorrectlly. 10890bbaf66SJie Yang 109ac1efcfbSRandy Dunlap For some embedded devices, we may disable it to reduce memory 11090bbaf66SJie Yang footprint, about 20KB on x86_64 platform. 11190bbaf66SJie Yang 1121da177e4SLinus Torvaldsconfig SND_SEQUENCER_OSS 1131da177e4SLinus Torvalds bool "OSS Sequencer API" 11489fe5117STakashi Iwai depends on SND_SEQUENCER 115eb3b705aSTakashi Iwai depends on SND_OSSEMUL 1161da177e4SLinus Torvalds help 1171da177e4SLinus Torvalds Say Y here to enable OSS sequencer emulation (both 1181da177e4SLinus Torvalds /dev/sequencer and /dev/music interfaces). 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 1211da177e4SLinus Torvalds 122c2f60c52SFrederik Deweerdt If you choose M in "Sequencer support" (SND_SEQUENCER), 123c2f60c52SFrederik Deweerdt this will be compiled as a module. The module will be called 124c2f60c52SFrederik Deweerdt snd-seq-oss. 1251da177e4SLinus Torvalds 126bbaf5e97STakashi Iwaiconfig SND_HRTIMER 127bbaf5e97STakashi Iwai tristate "HR-timer backend support" 128bbaf5e97STakashi Iwai depends on HIGH_RES_TIMERS 129bbaf5e97STakashi Iwai select SND_TIMER 130bbaf5e97STakashi Iwai help 131bbaf5e97STakashi Iwai Say Y here to enable HR-timer backend for ALSA timer. ALSA uses 132bbaf5e97STakashi Iwai the hrtimer as a precise timing source. The ALSA sequencer code 133bbaf5e97STakashi Iwai also can use this timing source. 134bbaf5e97STakashi Iwai 135bbaf5e97STakashi Iwai To compile this driver as a module, choose M here: the module 136bbaf5e97STakashi Iwai will be called snd-hrtimer. 137bbaf5e97STakashi Iwai 138bbaf5e97STakashi Iwaiconfig SND_SEQ_HRTIMER_DEFAULT 139bbaf5e97STakashi Iwai bool "Use HR-timer as default sequencer timer" 140bbaf5e97STakashi Iwai depends on SND_HRTIMER && SND_SEQUENCER 141bbaf5e97STakashi Iwai default y 142bbaf5e97STakashi Iwai help 143bbaf5e97STakashi Iwai Say Y here to use the HR-timer backend as the default sequencer 144bbaf5e97STakashi Iwai timer. 145bbaf5e97STakashi Iwai 146332682b1SClemens Ladischconfig SND_DYNAMIC_MINORS 147b10e5391SClemens Ladisch bool "Dynamic device file minor numbers" 148332682b1SClemens Ladisch help 149332682b1SClemens Ladisch If you say Y here, the minor numbers of ALSA device files in 150332682b1SClemens Ladisch /dev/snd/ are allocated dynamically. This allows you to have 151332682b1SClemens Ladisch more than 8 sound cards, but requires a dynamic device file 152332682b1SClemens Ladisch system like udev. 153332682b1SClemens Ladisch 154332682b1SClemens Ladisch If you are unsure about this, say N here. 155332682b1SClemens Ladisch 1567bb2491bSTakashi Iwaiconfig SND_MAX_CARDS 1577bb2491bSTakashi Iwai int "Max number of sound cards" 1587bb2491bSTakashi Iwai range 4 256 1597bb2491bSTakashi Iwai default 32 1607bb2491bSTakashi Iwai depends on SND_DYNAMIC_MINORS 1617bb2491bSTakashi Iwai help 1627bb2491bSTakashi Iwai Specify the max number of sound cards that can be assigned 1637bb2491bSTakashi Iwai on a single machine. 1647bb2491bSTakashi Iwai 16559d48582STakashi Iwaiconfig SND_SUPPORT_OLD_API 16659d48582STakashi Iwai bool "Support old ALSA API" 16759d48582STakashi Iwai default y 16859d48582STakashi Iwai help 16959d48582STakashi Iwai Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3 17059d48582STakashi Iwai or older). 17159d48582STakashi Iwai 172e0ecb05aSJie Yangconfig SND_PROC_FS 173e0ecb05aSJie Yang bool "Sound Proc FS Support" if EXPERT 174e0ecb05aSJie Yang depends on PROC_FS 175e0ecb05aSJie Yang default y 176e0ecb05aSJie Yang help 177e0ecb05aSJie Yang Say 'N' to disable Sound proc FS, which may reduce code size about 178e0ecb05aSJie Yang 9KB on x86_64 platform. 179e0ecb05aSJie Yang If unsure say Y. 180e0ecb05aSJie Yang 18121a3479aSJaroslav Kyselaconfig SND_VERBOSE_PROCFS 18221a3479aSJaroslav Kysela bool "Verbose procfs contents" 183e0ecb05aSJie Yang depends on SND_PROC_FS 18421a3479aSJaroslav Kysela default y 18521a3479aSJaroslav Kysela help 18621a3479aSJaroslav Kysela Say Y here to include code for verbose procfs contents (provides 187a982ac06SMatt LaPlante useful information to developers when a problem occurs). On the 18821a3479aSJaroslav Kysela other side, it makes the ALSA subsystem larger. 18921a3479aSJaroslav Kysela 1901da177e4SLinus Torvaldsconfig SND_VERBOSE_PRINTK 1911da177e4SLinus Torvalds bool "Verbose printk" 1921da177e4SLinus Torvalds help 1931da177e4SLinus Torvalds Say Y here to enable verbose log messages. These messages 1941da177e4SLinus Torvalds will help to identify source file and position containing 1951da177e4SLinus Torvalds printed messages. 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds You don't need this unless you're debugging ALSA. 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvaldsconfig SND_DEBUG 2001da177e4SLinus Torvalds bool "Debug" 2011da177e4SLinus Torvalds help 2021da177e4SLinus Torvalds Say Y here to enable ALSA debug code. 2031da177e4SLinus Torvalds 20462cf872aSTakashi Iwaiconfig SND_DEBUG_VERBOSE 20562cf872aSTakashi Iwai bool "More verbose debug" 2061da177e4SLinus Torvalds depends on SND_DEBUG 2071da177e4SLinus Torvalds help 20862cf872aSTakashi Iwai Say Y here to enable extra-verbose debugging messages. 20962cf872aSTakashi Iwai 21062cf872aSTakashi Iwai Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages. 21162cf872aSTakashi Iwai So, say Y only if you are ready to be annoyed. 21261fb63c0SJaroslav Kysela 21361fb63c0SJaroslav Kyselaconfig SND_PCM_XRUN_DEBUG 21461fb63c0SJaroslav Kysela bool "Enable PCM ring buffer overrun/underrun debugging" 21561fb63c0SJaroslav Kysela default n 216b7d90a35STakashi Iwai depends on SND_DEBUG && SND_VERBOSE_PROCFS 21761fb63c0SJaroslav Kysela help 21861fb63c0SJaroslav Kysela Say Y to enable the PCM ring buffer overrun/underrun debugging. 21961fb63c0SJaroslav Kysela It is usually not required, but if you have trouble with 22061fb63c0SJaroslav Kysela sound clicking when system is loaded, it may help to determine 22161fb63c0SJaroslav Kysela the process or driver which causes the scheduling gaps. 222e922b002STakashi Iwai 223e922b002STakashi Iwaiconfig SND_VMASTER 224e922b002STakashi Iwai bool 2250528c749SMichal Marek 226cc6a8acdSTakashi Iwaiconfig SND_DMA_SGBUF 227cc6a8acdSTakashi Iwai def_bool y 228cc6a8acdSTakashi Iwai depends on X86 229cc6a8acdSTakashi Iwai 2300528c749SMichal Mareksource "sound/core/seq/Kconfig" 231