On 25/01/2020 18:20, R.Wieser wrote:
> 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
>
>

How long does the sound play for?

--- SoupGate-Win32 v1.05