Hi Tim, Requirements looks OK. ...typo..... "and instruments that can be modified during the lifetime of the note " I think you meant " parameters that can be ..." The following made me uneasy... "The host must be able to set a limit on the number of voices active in a polyphonic instrument" The host?. To me, that's normally managed by the synth. The obvious example being a hardware synth, which has fixed polyphony. Jeff ---------------------------------------------------------------------- Generalized Music Plugin Interface (GMPI) public discussion list Participation in this list is contingent upon your abiding by the following rules: Please stay on topic. You are responsible for your own words. Please respect your fellow subscribers. Please do not redistribute anyone else's words without their permission. Archive: //www.freelists.org/archives/gmpi Email gmpi-request@xxxxxxxxxxxxx w/ subject "unsubscribe" to unsubscribe