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Hi all,

does anyone know what happened to ALSA playback recently?

To tell you the full story. Up to now my system was based on 64Studio stable 2.1
which is close to Debian/Etch. I used to build cinlerra myself, based on the
debian package, especially because of my custom patch for augmenting the
handling of the automation curves. The last version I used was about 6/2007

Now I've got to upgrade to a Debian/Lenny based system and as a consequence
have to look how to upgrade most of my media applications, to get again a
stable base for my work.


So I've grabbed the latest git (from 2008-12-27) and cooked together my own
debian/rules and control with some of the good ideas from the Akirad pakage,
especially the Idea of using the XLib without XCB to circumvent the
deadlock problems.
Basically this part went fine and I was able to re-build cinelerra.

Now what keeps me wondering is what happened to ALSA playback.
I am sure I used ALSA in my previous version: My old Cinelerra_rc contains:

AUDIO_OUT_DRIVER_0 4
ALSA_OUT_DEVICE Hammerfall DSP #0

Now, when starting playback with this setting, there is no sound and
the console output tells me:

ALSA lib pcm.c:2144:(snd_pcm_open_noupdate) Unknown PCM Hammerfall DSP #0
AudioALSA::open_output plughw:1,0: No such file or directory


If I change the entry in the settings box to just be "hw:1", cinelerra doesn't
complain, but reports continuosly
AudioALSA::write_buffer underrun at sample 2228

and there is still no sound.

Playback with OSS works.
Playback with ALSA works fine with Jack or within vlc.


Has anyone any idea what might have changed in that area and what might the
proper configuration to get it back working? Actually, I could just switch
over to OSS for cinelerra, but I don't like the idea that something breaks
and I can't figure out what happened ;-)

Cheers,
Hermann Vosseler



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