Many thanks for the replies, but one thing I don't quite understand. I'm not sure what you mean by "left -right". Would that not be reversing the polarity of the signal and then adding them together, or am I missing something critical. On Wed, 2006-06-14 at 14:30 +0300, Sampo Savolainen wrote: > Quoting Ismael Valladolid Torres <ivalladolidt@xxxxxxxx>: > > > AFAIK you can do left channel minus right channel so you're killing > > whatever it's in the middle of the stereo field, which usually are > > vocals. This work for karaoke. But I don't know a way to kill > > everything except the middle of the stereo field, and I don't think > > it's posible. > > Reverse polarity on either channel (left or right, it doesn't matter) and > then do a LEFT-RIGHT and you'll end up with the signal that Ismael's > technique removed. > > Sampo -- Jonty Needham <jmn20@xxxxxxxxxx>
