On Wednesday 24 February 2010 03:17:12 pm Peter Lukac wrote: > On Wednesday 24 February 2010 11:44:17 am you wrote: > > On Wed, 24 Feb 2010, Peter Lukac wrote: > > > Hello everyone, > > > > > > I need debug my program with alsa driver and i need something like > > > virtual microphone. I would like device "microphone" where i can put > > > sound file and this file will be input for microphone stream. And in > > > application i get this stream from this "microphone" > > > > Use file plugin in alsa-lib or snd-aloop kernel module as loopback. > > > > http://www.alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html > > > > Jaroslav > > > > ----- > > Jaroslav Kysela <perex@xxxxxxxx> > > Linux Kernel Sound Maintainer > > ALSA Project, Red Hat, Inc. > > Hi again :) > > Thanks for reply. I think this should by work.. > but i'm confused with asound.conf file. > > i have: > > pcm.virtmic { > type file > slave { > pcm { > type hw > } > } > infile /opt/raw.dat > > } > > and i can't see it with aplay -L ...yes i think it is bad :( > > What is slave and pcm section? And why is > pcm section in slave and slave is in pcm section? is any documentation > which explain this? i try find it but without success. Maybe i'm blind but > anywhere is lots of examples and no explanation what is slave and pcm > section and how it works together.... > or can me put here some very basic example how to create virtual microphone > with default soundcard? > > > and... > is some easy commad how can i create raw data from wav file? or i have to > make file plugin for write? > > thanks > > OK again :) i found some article at http://alsa.opensrc.org/index.php/.asoundrc#Plugins i created following config: pcm.sc { type hw card 0 } pcm_slave.smic { pcm sc #channels 2 #rate 8000 } pcm.vmic { type file slave smic infile "/opt/pokus.dat" format "raw" } when i run command: arecord -Dplug:vmic and uncomment line with channels or rate i get error: ALSA lib pcm.c:6644:(snd_pcm_slave_conf) Unknown field channels or ALSA lib pcm.c:6644:(snd_pcm_slave_conf) Unknown field rate but when i comment these lines i get : ALSA lib pcm_file.c:604:(_snd_pcm_file_open) file is not defined why? i defined file as infile "/opt/pokus.dat" and why field channels and rate are unknown? but when i change infile for output as file "/opt/pokus.dat" and run : aplay -Dplug:vmic my_wav.wav it's works. thanks ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
