At last, I could solve the problemm. In case anybody is interested,
here is how:
in /etc/modprobe.d/alsa-base.conf:
options snd-usb-audio index=1
After that, and reboot, the Z515 is seen in /proc/asound/cards, and in 'aplay
-L'
and the sound works with vlc or audacity, but not with aplay, speaker-test,
mplayer.
The output of these 3 programs is very instructive, and IMHO should be given
as an example in all programmers' schools!
-> speaker-test
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
Playback open error: -2,No such file or directory
->aplay woow.wav
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
aplay: main:722: audio open error: No such file or directory
-> mplayer file.mp3
... open '/dev/snd/pcmC1D1p' failed (-2): No such file or directory
with the first 2, impossiblle to guess what's wrong or missing.
with the 3rd one, you have the answer: just do
->sudo ln -s /dev/snd/pcmC1D0p /dev/snd/pcmC1D1p
and that's it!
Still difficult to understand why it worked with vlc, as it is configured to
use the Alsa output.
cheers,
--
Pierre Frenkiel
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