Le 07 Oct à 10:22, Lars Luthman ecrivait: > I wrote a trivial LADSPA plugin to do that a while ago. It's not > officially released, but I think I posted it on the old Om mailing lise. Thank you very much, that's exactly what I was searching for. I've found your plugin there : http://lists.gnu.org/archive/html/om-synth/2005-11/msg00032.html The result is here : http://www.jazzcomputer.org/om.jpg http://www.jazzcomputer.org/noise.om As, without your plugin, I've spent much more than three or four hours to do what I wanted without success, and found the solution in 5 minutes with it, I'd be very curious and interested to know how this can be achieved in the « traditional » way in Om, i.e. controlling in time the evolution of a filter with an envelope, which seems a somewhat common use of a synth to me :). Thanks again, Y.