I have a VST plugin that is supposed to play upto 15 separate instruments at once. However, I can only seem to be able to edit the piano roll for the first instrument, so the other 14 are useless. If I want to add another instrument, I have to add another instance of the plugin and use its first instrument. This takes up a lot of RAM and CPU power, as I am only using 1/15 of the plugin's capacity. How do I edit the piano roll for the other 14 instruments? Edit: I know now. You have to assign your VST a port number that isn't already used. Then create a MIDI Out channel and change its port to the same one as the VST. The MIDI-Out's "Channel" Number corresponds to the plugin's instrument number.