ALSA SoC (ASoC)

Try aplay -L and do trace-cmd when doing speaker-test on that card. For example:

$ aplay -L
...
plughw:CARD=sofhdadsp,DEV=0
    sof-hda-dsp, 
    Direct hardware device without any conversions
...

Then:

$ sudo trace-cmd -p function_graph -F \
    speaker-test -t wav -c 2 -Dplughw:sofhdadsp

And finally:

$ trace-cmd report | less

References

Videos

• Generic ALSA SoC Sound Card History (Simple/Graph) - Kuninori Morimoto, Renesas Electronics
• Insight of an Audio Driver Based on ALSA - Chandrasekar Ramakrishnan, Samsung
• ASoC: Supporting Audio on an Embedded Board - Alexandre Belloni, Bootlin
• FOSDEM 2024 - From phone hardware to mobile Linux (11:20)

Links

• ALSA SoC Layer
• ALSA overview
• Soundcard configuration
• Audio and Embedded Linux