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ALSACTL(1)		    General Commands Manual		    ALSACTL(1)

NAME
       alsactl - advanced controls for ALSA soundcard driver

SYNOPSIS
       alsactl [options] [store|restore|init] <card # or id or device>

       alsactl monitor <card # or id>

DESCRIPTION
       alsactl	is  used  to  control advanced settings	for the	ALSA soundcard
       drivers.	It supports multiple soundcards. If  your  card	 has  features
       that  you can't seem to control from a mixer application, you have come
       to the right place.

COMMANDS
       store saves the current driver state for	the selected soundcard to  the
       configuration file.

       restore loads driver state for the selected soundcard from the configu-
       ration file. If restoring fails (eventually partly), the	init action is
       called.

       nrestore	 is  like  restore,  but it notifies also the daemon to	do new
       rescan for available soundcards.

       init tries to initialize	all devices to a default state.	If  device  is
       not known, error	code 99	is returned.

       daemon manages to save periodically the sound state.

       rdaemon like daemon but restore the sound state at first.

       kill  notifies  the daemon to do	the specified operation	(quit, rescan,
       save_and_quit).

       monitor is for monitoring the events received from  the	given  control
       device.

       If  no  soundcards  are	specified,  setup for all cards	will be	saved,
       loaded or monitored.

OPTIONS
       -h, --help
	      Help: show available flags and commands.

       -d, --debug
	      Use debug	mode: a	bit more verbose.

       -v, --version
	      Print alsactl version number.

       -f, --file
	      Select  the  configuration  file	to   use.   The	  default   is
	      /var/lib/alsa/asound.state.

       -l, --lock
	      Use  the	file locking to	serialize the concurrent access	to the
	      state file (this option is default for the global	state file).

       -L, --no-lock
	      Do not use the file locking to serialize the  concurrent	access
	      to the state file	(including the global state file).

       -O, --lock-state-file
	      Select the state lock file path.

       -F, --force
	      Used  with restore command.  Try to restore the matching control
	      elements as much as possible.  This option  is  set  as  default
	      now.

       -g, --ignore
	      Used with	store and restore commands. Do not show	'No soundcards
	      found' and do not	set an error exit code when soundcards are not
	      installed.

       -P, --pedantic
	      Used  with  restore  command.  Don't restore mismatching control
	      elements.	 This option was the old default behavior.

       -I, --no-init-fallback
	      Don't initialize cards if	restore	fails.	Since version  1.0.18,
	      alsactl  tries to	initialize the card with the restore operation
	      as default.  But this can	cause incompatibility with  the	 older
	      version.	 The caller may	expect that the	state won't be touched
	      if no state file exists.	This option takes the restore behavior
	      back to the older	version	by suppressing the initialization.

       -r, --runstate
	      Save  restore and	init state to this file. The file will contain
	      only errors.  Errors are appended	with the soundcard id  to  the
	      end of file.

       -R, --remove
	      Remove runstate file at first.

       -E, --env #=#
	      Set  environment	variable  (useful  for	init action or you may
	      override ALSA_CONFIG_PATH	to read	different or optimized config-
	      uration -	may be useful for "boot" scripts).

       -i, --initfile
	      The    configuration   file   for	  init.	  By   default,	  PRE-
	      FIX/share/alsa/init/00main is used.

       -p, --period
	      The store	period in seconds for the daemon command.

       -e, --pid-file
	      The pathname to store the	process-id file	in the HDB UUCP	format
	      (ASCII).

       -b, --background
	      Run the task in background.

       -s, --syslog
	      Use syslog for messages.

       -n, --nice
	      Set the process priority (see 'man nice')

       -c, --sched-idle
	      Set the process scheduling policy	to idle	(SCHED_IDLE).

FILES
       /var/lib/alsa/asound.state  (or	whatever  file you specify with	the -f
       flag) is	used to	store current settings for your	soundcards.  The  set-
       tings  include  all  the	 usual	soundcard mixer	settings.  More	impor-
       tantly, alsactl is capable of controlling other card-specific  features
       that mixer apps usually don't know about.

       The  configuration  file	 is generated automatically by running alsactl
       store. Editing the configuration	file by	hand may be necessary for some
       soundcard features (e.g.	enabling/disabling automatic mic gain, digital
       output, joystick/game ports, some future	MIDI routing options, etc).

SEE ALSO
	amixer(1), alsamixer(1), aplay(1), alsactl_init(7)

BUGS
       None known.

AUTHOR
       alsactl is by  Jaroslav	Kysela	<perex@perex.cz>  and  Abramo  Bagnara
       <abramo@alsa-project.org>.   This   document   is   by	Paul   Winkler
       <zarmzarm@erols.com>.

				  07 May 2014			    ALSACTL(1)

NAME | SYNOPSIS | DESCRIPTION | COMMANDS | OPTIONS | FILES | SEE ALSO | BUGS | AUTHOR

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