# 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_SEQ_DEVICE
  	tristate
  
  config SND_RAWMIDI
  	tristate
  	select SND_SEQ_DEVICE if SND_SEQUENCER != n
  
  config SND_COMPRESS_OFFLOAD
  	tristate
  
  config SND_JACK
  	bool
  
  # enable input device support in jack layer
  config SND_JACK_INPUT_DEV
  	bool
  	depends on SND_JACK
  	default y if INPUT=y || INPUT=SND
  
  config SND_OSSEMUL
  	bool "Enable OSS Emulation"
  	select SOUND_OSS_CORE
  	help
  	  This option enables the build of OSS emulation layer.
  
  config SND_MIXER_OSS
  	tristate "OSS Mixer API"
  	depends on 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"
  	depends on 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 unavailable, so
  	  those stubs that use pcm timer (e.g. dmix, dsnoop & co) may work
  	  incorrectlly.
  
  	  For some embedded devices, we may disable it to reduce memory
  	  footprint, about 20KB on x86_64 platform.
  
  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_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"