alsactl
alsactl --version (return code: 0)
alsactl version 1.1.0
alsactl --help (return code: 0)
Usage: alsactl <options> command
global options:
-h,--help this help
-d,--debug debug mode
-v,--version print version of this program
Available state options:
-f,--file # configuration file (default /var/lib/alsa/asound.state)
-l,--lock use file locking to serialize concurrent access
-L,--no-lock do not use file locking to serialize concurrent access
-O,--lock-state-file # state lock file path (default /var/lock/asound.state.lock)
-F,--force try to restore the matching controls as much as possible
(default mode)
-g,--ignore ignore 'No soundcards found' error
-P,--pedantic do not restore mismatching controls (old default)
-I,--no-init-fallback
don't initialize even if restore fails
-r,--runstate # save restore and init state to this file (only errors)
default settings is 'no file set'
-R,--remove remove runstate file at first, otherwise append errors
-p,--period # store period in seconds for the daemon command
-e,--pid-file # pathname for the process id (daemon mode)
Available init options:
-E,--env #=# set environment variable for init phase (NAME=VALUE)
-i,--initfile # main configuation file for init phase
(default /usr/share/alsa/init/00main)
-b,--background run daemon 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)
Available commands:
store <card> save current driver setup for one or each soundcards
to configuration file
restore <card> load current driver setup for one or each soundcards
from configuration file
nrestore <card> like restore, but notify the daemon to rescan soundcards
init <card> initialize driver to a default state
daemon <card> store state periodically for one or each soundcards
rdaemon <card> like daemon but do the state restore at first
kill <cmd> notify daemon to quit, rescan or save_and_quit
monitor <card> monitor control events
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