Alister,

> so take a look at the source code for a play

Like this one ?

https://www.alsa-project.org/alsa-doc/alsa-lib/_2test_2pcm_8c-example.html

or this one ?

https://raw.githubusercontent.com/bear24rw/alsa-utils/master/speaker-test/speak
er-test.c

Even though they might work flawlessly* , they are far from being a
simple/clear examples. :-(

*I'm not even sure of that, as the example I got (link in first post) works
great - using a sample rate of 44100 ...

Regards,
Rudy Wieser

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