This is caused by a conflict between the global MIDI channel and the
Part 1 MIDI channel. See the help pdf "a guide to using the Supernova
II Multitimbrally with a sequencer" (Any references within this help
pdf to 8 parts should be read as 6 parts for the Nova II).
http://www.novationmusic.com/support.asp?supportid=16&view=TandT
http://www.novationmusic.com/support.asp?supportid=16&view=TandT