1. Press the [Rhythm] key
2. Press the [Utility/Track Edit] key
3. Use the left/right cursor keys to call up "Utility MIDI" on the display.
4. Press [Enter]
5. You can now use the cursor keys to select "Drum Ch" or "Bass Ch", then press the [Enter] key.
6. You will then be shown the MIDI channel that is currently being used for either the Bass or Drums, depending on which you specified in step 5. You can use the rotary dial to call up the channel of choice
7. Once you have made the settings you want, press the [Exit] key several times to return to the main screen.