Re: Swiss Army Knife of Sound has me Baffled.

[Dan Ritter <dsr@randomstring.org>]

Martin McCormick wrote: 
> 	So, I want a mono version.  Let's try this:
> 
> #! /bin/sh
> cd ~/tmp
> filename=$1.wav
> echo $filename
> arecord -D hw:1,0 -r 48000 -d $2 -c 1 -f S16_LE - \
> | sox -t wav - -r44100 $filename
> 
> This hasn't worked yet.  It is identical to the good version but
> for c 1 as the number of channels to arecord instead of c 2 .

...
 
> arecord: set_params:1345: Channels count non available
> sox FAIL formats: can't open input  `-': WAVE: RIFF header not found

Keep recording 2 channels. Your hardware doesn't like it
otherwise.

You can ask sox:

sox -t wav -c1 - -r44100 $filename

to merge the channels to a single output channel

I believe, but have not tested, that a final argument to sox of

remix 1

will get you just the left channel, or remix 2 for the right
channel.

-dsr-