This may, or may not be helpful. I'm not sure if they
still do this or not, but S.U.S.E. Linux used to trigger
various sounds on various events, like opening, and
closing windows, mouse clicks, and so forth. You
could mix, and match the sounds/events to the way you
liked them.
Having a look at their code might be a help.
Bill
On Mon, 4 Jun 2018, Frank Thomas via Alsa-user wrote:
I would like to further clarify some things.
I actually need get triggered when the ALSA device started to run,
meaning the device is producing or outputting samples.
FYI: The actual sound controller is connected via an I²S interface and
synchronizes on its the word select signal. After the synchronisation,
additional configuration must to occur before you can get valid samples
from the ALSA interface. The configuration is lost upon synchronisation
loss (ALSA device is not running anymore).
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