>>> I would say that that kind of plugin is not useful without a custom UI, and in which case the show/hide behaviour of parameters can be controlled by the UI. They dont have to be hidden form the host, jsut the user. <<< So you are saying allow dyanamic hidden parameters, but not dynamic parameter creation? If so, how could you implement a plugin that was a modular synthesizer? How could the plugin anticipate what modules the user might create, and might therefore require parameters? >>> This would require dynmamic port creation, but whats the use case? <<< Parity with existing plugin standards in the market. DXi and OPT support dynamic audio output creation. ---------------------------------------------------------------------- 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