The preset Performances use between 1&6 parts each. Most of the
layered Performances only use 2 or 3 Parts. The remaining parts have
been deactivated by setting the polyphony to "off". If these parts are
required, set the polyphony to either "poly"," mono" or "prog". A
setting of "Poly" will set the part to play more than one note at a
time (polyphonic), A setting of "Mono" will set the part to play one
note at a time (monophonic), A setting of "Prog" will set the part
polyphony to follow the polyphony setting already used in any program
which is then assigned to the part - eg if a monophonic program is
assigned to a part, the part polyphony will be monophonic.
Other causes of parts not sounding are: a part volume level of 000 has
been received; the MIDI channel for the part is incorrect; the part
range or velocity switching for the part is incorrect; the part has
been set to a different audio output pair.