Hallo! > [phasor~ 0.1] > | > | > [*~1000] > | > | > [>~750] > But I still dont get how to do this with normal audiofile where > amplitude is not sawtooth like. I guess the phasor is meant hear as index for e.g. tabread4 ... So you could of course also do it with line: [line~] (from 1 to 1000) | [>~ 750] LG Georg