Am Samstag, 2. September 2006 20:21 schrieb Bill Unruh: > 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. > I read something about salsa "simple ALSA emulation on OSS drivers" from 4front technologies. I don't know if it's related to the issue here. http://www.4front-tech.com/forum/viewforum.php?f=24
Isn't it possible to achieve that using asym, dmix and dsnoop with alsa aware applications, or using aoss? ------------------------------------------------------------------------- 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
