I love using Mach 5's interface. It has it's strengths over EXS, and it's weaknesses. But I find it right for me. In particular, I like the fact that it is multi-timbral in one instance of the plug in. I have Mach 5 successfully set up my environment to take advantage of it's multi timbral functionality by patching a multi-instrument to Mach-5's instrument object. This works like a charm from a midi point of view. But I am still having problems. What I am not understanding is why the mixer faders of the individual sub channels (from this multi-instrument) are "grouped" (permanently linked) with the overall instrument fader (that which the instrument is inserted onto). Don't the sub channel faders generate MIDI volume data? Shouldn't that midi volume data channelize to the corresponding midi channel only? But instead, moving ANY of the sub channel faders also links to the master instrument fader and adjusts the ENTIRE instruments volume (all channels). Due to this oddity, there is no good way to mix the individual sub channels of a multi timbral instrument within Logic. There are volume "pots" within the Mach 5 interface....but they are not automatable parameters inside of logic. So if I want to automate and mix using Logic Control and Logic's mix automation...I seem to be out of luck for multi-timbral use of a Virtual Instrument. Hope that made sense. Am I missing something? Or is this just another quirk of Logic? Thanks for any help or feedback. Ron