# ALSA soundcard-configuration
  config SND_TIMER
  	tristate
  
  config SND_PCM
  	tristate
  	select SND_TIMER if SND_PCM_TIMER
  
  config SND_PCM_ELD
  	bool
  
  config SND_PCM_IEC958
  	bool
  
  config SND_DMAENGINE_PCM
  	tristate
  
  config SND_HWDEP
  	tristate
  
  config SND_RAWMIDI
  	tristate
  
  config SND_COMPRESS_OFFLOAD
  	tristate
  
  # To be effective this also requires INPUT - users should say:
  #    select SND_JACK if INPUT=y || INPUT=SND
  # to avoid having to force INPUT on.
  config SND_JACK
  	bool
  
  config SND_SEQUENCER
  	tristate "Sequencer support"
  	select SND_TIMER
  	help
  	  Say Y or M to enable MIDI sequencer and router support.  This
  	  feature allows routing and enqueueing of MIDI events.  Events
  	  can be processed at a given time.
  
  	  Many programs require this feature, so you should enable it
  	  unless you know what you're doing.
  
  config SND_SEQ_DUMMY
  	tristate "Sequencer dummy client"
  	depends on SND_SEQUENCER
  	help
  	  Say Y here to enable the dummy sequencer client.  This client
  	  is a simple MIDI-through client: all normal input events are
  	  redirected to the output port immediately.
  
  	  You don't need this unless you want to connect many MIDI
  	  devices or applications together.
  
  	  To compile this driver as a module, choose M here: the module
  	  will be called snd-seq-dummy.
  
  config SND_OSSEMUL
  	select SOUND_OSS_CORE
  	bool
  
  config SND_MIXER_OSS
  	tristate "OSS Mixer API"
  	select SND_OSSEMUL
  	help
  	  To enable OSS mixer API emulation (/dev/mixer*), say Y here
  	  and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  
  	  Many programs still use the OSS API, so say Y.
  
  	  To compile this driver as a module, choose M here: the module
  	  will be called snd-mixer-oss.
  
  config SND_PCM_OSS
  	tristate "OSS PCM (digital audio) API"
  	select SND_OSSEMUL
  	select SND_PCM
  	help
  	  To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
  	  here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  
  	  Many programs still use the OSS API, so say Y.
  
  	  To compile this driver as a module, choose M here: the module
  	  will be called snd-pcm-oss.
  
  config SND_PCM_OSS_PLUGINS
  	bool "OSS PCM (digital audio) API - Include plugin system"
  	depends on SND_PCM_OSS
          default y
  	help
            If you disable this option, the ALSA's OSS PCM API will not
            support conversion of channels, formats and rates. It will
            behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
  
  config SND_PCM_TIMER
  	bool "PCM timer interface" if EXPERT
  	default y
  	help
  	  If you disable this option, pcm timer will be inavailable, so
  	  those stubs used pcm timer (e.g. dmix, dsnoop & co) may work
  	  incorrectlly.
  
  	  For some embedded device, we may disable it to reduce memory
  	  footprint, about 20KB on x86_64 platform.
  
  config SND_SEQUENCER_OSS
  	bool "OSS Sequencer API"
  	depends on SND_SEQUENCER
  	select SND_OSSEMUL
  	help
  	  Say Y here to enable OSS sequencer emulation (both
  	  /dev/sequencer and /dev/music interfaces).
  
  	  Many programs still use the OSS API, so say Y.
  
  	  If you choose M in "Sequencer support" (SND_SEQUENCER),
  	  this will be compiled as a module. The module will be called
  	  snd-seq-oss.
  
  config SND_HRTIMER
  	tristate "HR-timer backend support"
  	depends on HIGH_RES_TIMERS
  	select SND_TIMER
  	help
  	  Say Y here to enable HR-timer backend for ALSA timer.  ALSA uses
  	  the hrtimer as a precise timing source. The ALSA sequencer code
  	  also can use this timing source.
  
  	  To compile this driver as a module, choose M here: the module
  	  will be called snd-hrtimer.
  
  config SND_SEQ_HRTIMER_DEFAULT
  	bool "Use HR-timer as default sequencer timer"
  	depends on SND_HRTIMER && SND_SEQUENCER
  	default y
  	help
  	  Say Y here to use the HR-timer backend as the default sequencer
  	  timer.
  
  config SND_RTCTIMER
  	tristate "RTC Timer support"
  	depends on RTC
  	select SND_TIMER
  	help
  	  Say Y here to enable RTC timer support for ALSA.  ALSA uses
  	  the RTC timer as a precise timing source and maps the RTC
  	  timer to ALSA's timer interface.  The ALSA sequencer code also
  	  can use this timing source.
  
  	  To compile this driver as a module, choose M here: the module
  	  will be called snd-rtctimer.
  
  	  Note that this option is exclusive with the new RTC drivers
  	  (CONFIG_RTC_CLASS) since this requires the old API.
  
  config SND_SEQ_RTCTIMER_DEFAULT
  	bool "Use RTC as default sequencer timer"
  	depends on SND_RTCTIMER && SND_SEQUENCER
  	depends on !SND_SEQ_HRTIMER_DEFAULT
  	default y
  	help
  	  Say Y here to use the RTC timer as the default sequencer
  	  timer.  This is strongly recommended because it ensures
  	  precise MIDI timing even when the system timer runs at less
  	  than 1000 Hz.
  
  	  If in doubt, say Y.
  
  config SND_DYNAMIC_MINORS
  	bool "Dynamic device file minor numbers"
  	help
  	  If you say Y here, the minor numbers of ALSA device files in
  	  /dev/snd/ are allocated dynamically.  This allows you to have
  	  more than 8 sound cards, but requires a dynamic device file
  	  system like udev.
  
  	  If you are unsure about this, say N here.
  
  config SND_MAX_CARDS
  	int "Max number of sound cards"
  	range 4 256
  	default 32
  	depends on SND_DYNAMIC_MINORS
  	help
  	  Specify the max number of sound cards that can be assigned
  	  on a single machine.
  
  config SND_SUPPORT_OLD_API
  	bool "Support old ALSA API"
  	default y
  	help
  	  Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
  	  or older).
  
  config SND_PROC_FS
          bool "Sound Proc FS Support" if EXPERT
          depends on PROC_FS
          default y
          help
            Say 'N' to disable Sound proc FS, which may reduce code size about
            9KB on x86_64 platform.
            If unsure say Y.
  
  config SND_VERBOSE_PROCFS
  	bool "Verbose procfs contents"
  	depends on SND_PROC_FS
  	default y
  	help
  	  Say Y here to include code for verbose procfs contents (provides
            useful information to developers when a problem occurs).  On the
            other side, it makes the ALSA subsystem larger.
  
  config SND_VERBOSE_PRINTK
  	bool "Verbose printk"
  	help
  	  Say Y here to enable verbose log messages.  These messages
  	  will help to identify source file and position containing
  	  printed messages.
  
  	  You don't need this unless you're debugging ALSA.
  
  config SND_DEBUG
  	bool "Debug"
  	help
  	  Say Y here to enable ALSA debug code.
  
  config SND_DEBUG_VERBOSE
  	bool "More verbose debug"
  	depends on SND_DEBUG
  	help
  	  Say Y here to enable extra-verbose debugging messages.
  	  
  	  Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
  	  So, say Y only if you are ready to be annoyed.
  
  config SND_PCM_XRUN_DEBUG
  	bool "Enable PCM ring buffer overrun/underrun debugging"
  	default n
  	depends on SND_DEBUG && SND_VERBOSE_PROCFS
  	help
  	  Say Y to enable the PCM ring buffer overrun/underrun debugging.
  	  It is usually not required, but if you have trouble with
  	  sound clicking when system is loaded, it may help to determine
  	  the process or driver which causes the scheduling gaps.
  
  config SND_VMASTER
  	bool
  
  config SND_DMA_SGBUF
  	def_bool y
  	depends on X86
  
  source "sound/core/seq/Kconfig"