Hi Angus, That's an interesting question. one clarification.. In GMPI, it's the host that holds the parameter state. Not the plugin. Your plugin is able to automate it's own parameters (via the Parameter Pre-Processor/ Actor) but it does so indirectly by hooking into the Host API. What i'm trying to say is, yes we probly need to diferentiate between stateful/non-stateful parameter updates...but it's the Host that gains the complication, not the plugin. Best Regards, Jeff McClintock SynthEdit ---------------------------------------------------------------------- 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