mm0fmf,

>> I've been scouring the web for days at end, and have found very little in
>> regard to example programs.   Could you post the URL to them ?
>
> https://www.alsa-project.org/alsa-doc/alsa-lib/examples.html

:-)  After my last post I found that page too (don't quite remember what the
exact search terms where though).

> Did you try these complex examples?

Nope.   They use a different approach, so they are useless to compare with.

> Did they work?

There is another simple example in that list, named "pwm_min".   It "works"
as long as you (again) do not look to closely:

1) It seems to be missing a "snd_pwm_drain()" call.   Thats OK ?  Don't
know.

2) 16*1024 (buffer size) *16 (loops) / 48000 (bitrate) equals 5.46 seconds.
Running "time ./pwm_min" shows 5.09 seconds.  Thats 17824 frames missing
(more than one buffers worth)...

In other words, the same "too short" problem.

I tried putting that "snd_pwm_drain()" function before closing the handle
here too, but that didn't fix it.

> If they did then you have a working example

They dont, and thats the problem.

> and simplifying the example is just a small matter of programming and
> anyone can program.

:-)   Just compare "pwm.c" and "pwn_min.c" examples with each other.   I
dare you to simplify the first into something that is as concise as the
second. :-p   (and no, I do not really expect you to do so)

@all:
But I /really/ would like one of the other RPi 3B(+) board owners to try to
recreate the problem and confirm its not just my combination of board, OS
and code.

Regards
Rudy Wieser

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