Difference between revisions of "ALSA"
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| − | ALSA or the Advanced Linux Sound Architecture provides audio support for Linux. It is a replacement for the old OSS linux sound system. The Alsa-utils package contains both the Alsamixer and Amixer utilities. | + | ALSA or the Advanced Linux Sound Architecture provides audio support for Linux. It is a replacement for the old OSS linux sound system. The Alsa-utils package contains both the Alsamixer and Amixer utilities. Various linux distributions once used the Open Sound System, or OSS until ALSA superseded it. ALSA provides kernel driven sound card drivers and bundles a user space driven library for application developers. |
You can control the audio properties of your sound cards through: | You can control the audio properties of your sound cards through: | ||
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==CLI Utilities== | ==CLI Utilities== | ||
| − | === | + | ===alsamixer=== |
ncurses based utility with visual representation of various levels. | ncurses based utility with visual representation of various levels. | ||
alsamixer | alsamixer | ||
| + | Enable the microphone: switch to the Capture tab with F4 and enable a channel with Space. | ||
| − | + | ===mixer=== | |
| − | === | + | |
Command line, operation performed per command. | Command line, operation performed per command. | ||
amixer -c [card-number] set [control] [value] | amixer -c [card-number] set [control] [value] | ||
| Line 21: | Line 21: | ||
If you are sudo there are more controls available | If you are sudo there are more controls available | ||
sudo amixer scontrols | sudo amixer scontrols | ||
| + | |||
| + | ===apulse=== | ||
| + | The apulse utility lets you use ALSA for applications that support only PulseAudio for sound. | ||
| + | |||
| + | ===aplay=== | ||
| + | Alsa play - play an audio file | ||
| + | |||
| + | ===speaker-test=== | ||
| + | as the name implies | ||
[[Category:Computer_Technology]] | [[Category:Computer_Technology]] | ||
[[Category:Linux]] | [[Category:Linux]] | ||
Revision as of 17:11, 25 March 2021
ALSA or the Advanced Linux Sound Architecture provides audio support for Linux. It is a replacement for the old OSS linux sound system. The Alsa-utils package contains both the Alsamixer and Amixer utilities. Various linux distributions once used the Open Sound System, or OSS until ALSA superseded it. ALSA provides kernel driven sound card drivers and bundles a user space driven library for application developers.
You can control the audio properties of your sound cards through:
- Alsamixer-The graphical interface for ALSA
- Amixer-The command based utility for ALSA
CLI Utilities
alsamixer
ncurses based utility with visual representation of various levels.
alsamixer
Enable the microphone: switch to the Capture tab with F4 and enable a channel with Space.
mixer
Command line, operation performed per command.
amixer -c [card-number] set [control] [value]
To see what controls you can manage
amixer scontrols
If you are sudo there are more controls available
sudo amixer scontrols
apulse
The apulse utility lets you use ALSA for applications that support only PulseAudio for sound.
aplay
Alsa play - play an audio file
speaker-test
as the name implies
