On 17-03-08 03:57, Alexander Indenbaum wrote:
I'm playing with embedded system without any hardware sound device. I'd like to grab sound from ALSA application, for instance Firefox displaying YouTube clip inside flash plugin and to store output PCM stream into file on local disk. I got an advice to use File extension. So I defined following /usr/share/alsa/alsa.conf
Don't do it there. Use /etc/asound.conf or $HOME/.asoundrc ...
pcm.default{ type file file /tmp/pcm.out }
... and make it
pcm.!default { type file slave { pcm null } file "/tmp/pcm.out" }
Exactly why you need that slave definition I'm not sure either, but it seems you do. Also note that /tmp/pcm.out will be headerless PCM and is recreated for individual opens. I don't believe there's an append mode or anything (and you'd need to make sure that everyone plays the same format) so not toot sure if this is what you need to have a catch all audio-sink...
Rene.