To be more precise, MIDI track has no audio but only informations to trigg the rompler/sampler inside EZD.
EZD rompler is playing all samples and affect its via the mixer. A MIDI track/part contain only some binary informations that said for exemple: "Play a C#3 at a velocity value of 114", "Stop playing its C#3", "Play a D2 at a velocity value of 51", "Stop playing its D2", etc...
The ability to have some "overhead" or other is not from the MIDI protocole, but from the VSTi capabilities.
