On Fri, 23 Aug 2019 at 01:44, Jeanette C. <julien@xxxxxxxxxxx> wrote: > > is there an effect or a method to filter out everything from a stereo file but > the "centre"? A sort of reverse karaoke effect. Hi, my reply is interleaved with others below. On Fri, 23 Aug 2019 at 04:57, Jeanette C. <julien@xxxxxxxxxxx> wrote: > Aug 22 2019, Ralf Mardorf has written: > > On the quick my guess is > > > > Original left channel + inverted right channel = plain_left > > Original right channel + inverted left channel = plain_right L + (-R) = L-R = X = what was called above "plain_left" R + (-L) = R-L = Y = what was called above "plain_right" > > Original left channel + inverted plain_left = middle only > > Original right channel + inverted plain_right = middle only L + (-X) = L - X = L - (L - R) = L - L + R = R R + (-Y) = R - Y = R - (R - L) = R - R + L = L So you finish with the same signals that you started with, except that the channels are swapped. > That sounds good. Unforunately it didn't work. Both aspects explained above :) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
