|ALSACTL(1)||General Commands Manual||ALSACTL(1)|
alsactl monitor <card # or id>
alsactl [clean] <card # or id or device> [[control identifiers]]
The optional element identifiers are accepted as a filter. One extra argument is parsed as an element identifiers.
Example: alsactl clean 0 "name='PCM'" "name='Mic Phantom'"
- -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.
- -a, --config-dir
- Select the boot / hotplug ALSA configuration directory to use. The default is /var/lib/alsa.
- -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, restore and init 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 configuration - may be useful for "boot" scripts).
- -i, --initfile
- The configuration file for init. By default, PREFIX/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).
- -D, --ucm-defaults
- Execute also the 'defaults' section from the UCM configuration. The standard behaviour is to execute only 'once' section.
- -U, --no-ucm
- Skip the UCM init even if available. It may be useful for the test the legacy init configuration.
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).
|07 May 2014|