> Is there some reason the application doesn't do mono? Almost all > I've seen allow you to record only one track. Even on my MCP61, or > my Mobile Pre. Which are stereo devices. You could look at > audacity to see how it does it.
Yes you're right, audacity can record only one channel with the alsa driver. The things is that when I call (err = snd_pcm_hw_params_set_channels(handle, hwparams, 1)) , the answer is err= 0, meaning it cannot set channels number to 1. And if I let it set channels number to 2, my application complains. > At a minimum you should be able to split the track out after the fact. > > $ sox -c 2 stereo.wav -c 1 mono.wav avg -l No, as you say it's not usefull because I'm doing voice recognition in real time... > Maybe not useful for you if you need to do realtime continous > recording. Or something like voice recognition. But arecord > allows mono recording from a stereo device. Here is what I get when running arecord to record a mono file : [EMAIL PROTECTED]:~$ arecord -D default -r 48000 -c 1 -f S16_LE truc.wav Recording WAVE 'truc.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono arecord: set_params:906: Channels count non available So nobody can give me an answer about how to do it with a .asoundrc file? Or is there something that I can do in the implementation of the alsa driver? ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
