Re: [SoX-users] Extract one channel (pick or avg)

[Chris B. <ch...@cn...>]

There was a known bug in the avg effect of 12.17.3 that could cause 
these problems.  You can try out the prerelease version of sox 12.17.4 
that contains some bugfixes to it.  Its avaliable at http://sox.sf.net

Good luck,
Chris

scott wrote:
> Hi,
> 
> I have a wav file with 2 channels (l & r), and I am trying to use sox
> (12.17.3) to extract just one of the channels.  The pick option in the
> man page would appear to be perfect, but does not seem to be
> implemented:
> 
> bash-2.05$ sox -t wav mach3.wav -c 1 -t wav left.wav pick -l
> sox: Known effects: avg band bandpass bandreject chorus compand copy
> dcshift deemph earwax echo echos fade filter flanger highp highpass lowp
> lowpass map mask pan phaser pitch polyphase rate resample reverb reverse
> silence speed stat stretch swap synth trim vibro vol 
> 
> sox: Effect 'pick' is not known!
> 
> So I tried the avg -l (and avg -r):
> 
> sox -t wav begin.wav -c 1 -t wav left.wav avg -l
> 
> but that merges both tracks.  I believe the original is 2 tracks as I
> can open it in gnusound, see 2 tracks, delete one and get just the track
> I want.  The problem with gnusound is that the wav is 480Mb and I don't
> have the memory ( I could install more swap I suppose).
> 
> Any ideas appreciated.
> 



-- 
  Chris Bagwell (mailto:ch...@cn...)     |     Frisco, TX
           http://www.cnpbagwell.com/             |         USA