The coarse tuning parameter lets you change the pitch of the MC-303 in half-steps over a four-octave range. Since all registered parameter functions affect only the channel on which they are sent, you can transpose just the desired parts. This allows you to transpose a piece while leaving the drum and sound effect parts at their original pitch. Add the following messages to the event list of each track you wish to transpose:

Controller Value
CC101 00 Selects RPN function.
CC100 02 Selects coarse tuning as the parameter you want to adjust.
CC06 XX Sensitivity in half steps. The range is 40-88 with 64 being standard.