You can use Program Changes and Continuous Controller messages to accomplish common functions including Filter Sweeps, Vibrato, etc. System Exclusive messages can be used for more extensive editing. Turn off the MC-303. 1. Turn the power off and back on. The sounds in the MC-303 can be selected via MIDI by using bank select and program change messages.
Some computer based sequencers have patch lists or 'templates' available for various products.
These 'templates' allow you to select from a list of patch names, and will then send out the appropriate messages for you. You should check with the manufacturer of your particular sequencer to see if they have a MC-303 template available. If not, you must enter the proper bank select and program change messages to choose a sound. A continuous controller is a message that is defined in the MIDI specification. There are 128 different CCs that perform a number of different functions.