Phytec i.MX 93 - Page 72

i.MX 93 BSP Manual PD24.1.1 Documentation Rev.: imx8mp-pd22.1.2-51-ga548be7d
target:~$ aplay -L
Or type for recording devices:
target:~$ arecord -L
7.15.1 Alsamixer
To inspect the capabilities of your soundcard, call:
target:~$ alsamixer
You should see a lot of options as the audio-IC has many features you can experiment with. It might be
better to open alsamixer via ssh instead of the serial console, as the console graphical eects are better. You
have either mono or stereo gain controls for all mix points. “MM” means the feature is muted (both output,
left & right), which can be toggled by hitting ‘m’. You can also toggle by hitting ‘<’ for left and ‘>’ for
right output. With the tab key, you can switch between controls for playback and recording.
7.15.2 Restore default volumes
There are some default settings stored in /var/lib/alsa/asound.state. You can save your current alsa
settings with:
target:~$ alsactl --file </path/to/filename> store
You can restore saved alsa settings with:
target:~$ alsactl --file </path/to/filename> restore
7.15.3 ALSA conguration
Our BSP comes with a ALSA conguration le /etc/asound.conf.
The ALSA conguration le can be edited as desired or deleted since it is not required for ALSA to work
properly.
target:~$ vi /etc/asound.conf
To set PEB-AV-10 as output, set playback.pcm from “dummy” to “pebav10”:
[...]
pcm.asymed {
type asym
playback.pcm "pebav10"
capture.pcm "dsnoop"
}
[...]
If the sound is not audible change playback devices to the software volume control playback devices, set
playback.pcm to the respective softvol playback device e.g. “softvol_pebav10”. Use alsamixer controls to
vary the volume levels.
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