Hi all,
I'm writing to you in despair, it's been 5 days I've tried a lot of
things, none is working.
My soundcard cannot handle recording on just one channel (it's a USB
card). I'm running ubuntu Hardy 8.04 with kernel 2.6.24.rt .
The problem is that the program I'm running is written to be use with
mono audio stream, and I don't want to enter the code too far. I have
access to the part of code that implement alsa functions.
I was thinking that I can convert the stereo stream into mono stream
by using the .asoundrc file and by declaring plug or plughw, but I
can't get it to work, I have various error like :
ALSA lib pcm.c:6569:(snd_pcm_slave_conf) Invalid slave definition
arecord: main:546: audio open error: Invalid argument
Here is the .asoundrc :
pcm.rate_convert {
type plug
slave {
pcm "hw:1,1"
rate 48000
channels 1
}
}
Can anyone explain me how to write a proper plu or plughw that will
do the trick?
Thanks so much in advance!
Bruno.
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