I have "Massive" from Native instruments and am able to get garageband to recognize it and play it but.... The new track that I create has that piano sound that plays over top of the massive sound. If I just mute the piano I still hear masssive, and it records the midi inputs, but playback still puts out the piano and no massive. How do I get an external software synth in GB without that overlay of piano? There is no "blank" or "none" track Thanks for any input!!