søn, 25 01 2009 kl. 12:07 -0500, skrev Ben Abbott: > Søren, can you try these instead? > > freqz ([ones(1, 20), zeros(1, 768-20)], 1, 512, "half", 2); > > freqz ([zeros(1, 768-20), ones(1, 20)], 1, 512, "half", 2); I've updated http://hauberg.org/freqz to only show these results Søren