There might be situations where you want to have MIDI Thru active (see the Getting Started book), but still don’t want one certain type of MIDI message to be sent “Thru” Cubase VST.
For example, System Exclusive that you send out from a MIDI Instrument to record into Cubase VST, should most probably not be immediately sent back to the instrument, since this might lead to serious confusion.
1. Open the MIDI Filter dialog.In this example System Exclusive and Program Change will not be Thru-put.