You can do something like this for a 2x4 array .. ! audiofirfilter kernel="<<(double)1, (double)0, (double)0, (double)0>, <0.0, 1.0, 0.0, 0.0>>" ! ... See audiomixmatrix element for reference ~BO -- Sent from: http://gstreamer-devel.966125.n4.nabble.com/