[linux-audio-user] Remixing

[Sampo Savolainen]

Quoting Ismael Valladolid Torres <ivalladolidt at terra.es>:

> 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