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Linux in a Nutshell, 6th Edition by Robert Love, Stephen Figgins, Ellen Siever, Arnold Robbins

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Name

alsactl

Synopsis

alsactl [options] [command] [card]

Control advanced configuration settings for sound cards using the ALSA (Advanced Linux Sound Architecture) system. Driver settings are written to and loaded from configuration files. The card can be specified as a card number, id, or device. If no card is specified, the configuration for all cards is saved or loaded. The default configuration file is /etc/asound.state.

Commands

init

Attempt to initialize all sound cards to a default state.

restore

Load the driver information from the configuration file.

store

Save the current driver information to the configuration file.

Options

-d, --debug

Debug mode: increased information output to the console.

-E var=value, --env var=value

Set an environment variable. Useful for init or to override ALSA_CONFIG_PATH.

-f file, --file=file

Specify the use of file instead of /etc/asound.state as a configuration file.

-F, --force

Force the restoration of settings; used with restore. This is the default.

-g, --ignore

With store and restore, do not display errors and do not set error exit codes.

-h, --help

Display help message and quit.

-i file, --initfile=file

Specify the configuration file for init. The default is /usr/share/alsa/init/00main.

-p, --pedantic

Ignore mismatched control settings; used with restore.

-r file, --runstate=file

Save restore and init errors to the specified file, appending new errors to the end of the file (unless -R is specified).

-R, --remove

Remove the runstate file first, before running the restore ...

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