[linux-audio-user] Copying one channel from a Stereo File with sox

Martin McCormick martin at dc.cis.okstate.edu
Sat Jun 26 13:52:40 EDT 2004

	I am confused.  The man page for sox lists what appears to be
an effect called pick in which you provide it with a channel number
from 1 to 4 or a -l or -r flag to select either left or right audio to
feed to the output file.

	After getting complaints from sox, I listed the -help output
and got:

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 

no pick.  The manual contains the following passage:

	   phaser gain-in gain-out delay decay speed < -s | -t >
	   pick [ -1 | -2 | -3 | -4 | -l | -r ]
	   pitch shift [ width interpole fade ]
	   polyphase [ -w < nut / ham > ]

	Is this something peculiar to the Debian distribution for sox
or what?  Am I just misunderstanding the instructions and trying to
use  pick  in the wrong way?

	Thank you.

Martin McCormick WB5AGZ  Stillwater, OK 
OSU Information Technology Division Network Operations Group

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