On Sun, Aug 29, 2010 at 7:46 AM, rosea grammostola <rosea.grammostola(a)gmail.com> wrote: I'm sure it is possible, since it is available as a standard package in Fedora: Installed Packages Name : zynaddsubfx-dssi Arch : x86_64 Version : 2.4.1 Release : 1.fc12 Size : 523 k Repo : installed Summary : Real-time software synthesizer for DSSI URL : http://zynaddsubfx.sourceforge.net License : GPLv2 and GPLv2+ Description : ZynAddSubFX is an open source software synthesizer capable of making a : countless number of instrument sounds. It is microtonal, and the instruments : made by it sounds like those from professional keyboards. The program has : effects like Reverb, Echo, Chorus, Phaser... : : This package includes the DSSI implementation of the synthesizer. In qtractor, I noticed there was a ZynAddSubFX instrument definition that was made available in the track-properties dialog. With this setup, you can then select from the predefined ZynAddSubFX patches available on ones system. Therefore the GUI is Qtractor itself, and the patch selection is no different than any other properly setup external synth with a cakewalk instrument definition (.ins) setup for it in qtractor. Niels http://nielsmayer.com