On Sat, 2 Sep 2006, Lee Revell wrote: > On Sat, 2006-09-02 at 11:58 -0400, Geddes Munson wrote: >> Greetings, >> >> I am trying to get our college radio station to do online streaming, and I >> am pretty close. Running debian with the 2.6 kernel and the M-Audio M44 >> sound card. It all works, but I need to run two different encoding programs, >> darkice for mp3 streaming, and realproducer for streaming to the college's >> helix server. Both work individually, but I can't get them to work at the >> same time, when darkice is encoding (live from soundcard) realproducer spits >> out the error: >> >> Error: Could not open audio device '/dev/dsp' >> >> >> When I run it. If I run realproducer first, darkice spits out the same >> error. How can I configure ALSA to allow multiple applications to tap into >> the sound cards inputs? > > You'll have to use applications that support ALSA. /dev/dsp is the > legacy OSS API and unless you have a hardware mixing soundcard, using it > blocks other applications from using the sound device, as ALSA's > software mixing layer is bypassed. > > You might be able to run the OSS apps using the "aoss" wrapper but the > real solution is for your apps to support ALSA.
Actually it sounds like what he wants is that the same input be delivered to two separate programs. Not mixing, but splitting. He could of course run a little program to do the splitting. The problem is synchronisation. How do you make sure that all the data gets to all of the outputs. And that all of the outputs want the data in the same form (eg if one asks for 22050Hz and the other for 48000 Hz you are in trouble. ) He is almost certainly using the alsa oss emulation layer rather than real oss drivers. ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
