sound doesn't work until I login

[Karl Auer]

On Thu, 2016-09-08 at 17:12 +0300, Thierry Andriamirado wrote:
> > No browsers. No GUI. No screen, no keyboard, no mouse. No users, no
> > logins, no sessions. Just music.
> > 
> So what you needbis just plain ALSA. Without pulseaudio, which you
> have to desactivate.

That's what a couple of people, including Ralf, have suggested.

So I've run up a raspberry pi and modified my script to use ALSA
instead, and it all works beautifully.... with one exception.

To allow my system to play any format of music, the command that
actually delivers sound is this for pulseaudio:

   avconv -i file.ext -f wav - | play -t wav - 

That works very well. aplay looks like it should work too, but it
doesn't. This command:

   avconv -i file.ext -f wav - | aplay -t wav -

...doesn't play anything on the Pi. Nothing at all. Not static,
nothing. And it seems to exit immediately, regardless of how big the
input file is. But it *does* play back on my Ubuntu laptop.

If I convert the file and then play it, it works on both the Pi and my
laptop:

   avconv -i file.ext -f wav x.wav ; aplay -t wav x.wav

Regards, K.

-- 
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Karl Auer (kauer at biplane.com.au)
http://www.biplane.com.au/kauer
http://twitter.com/kauer389

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