You can adjust the volume/level of an individual instrument in the rhythm part by doing the following:
- Select the Rhythm Part for editing by pressing and holding [SHIFT] and then the [RHYTHM] button.
- Ensure that the [PATTERN] and [SOUND] buttons are unlit.
- In the Keyboard section, press the keyboard button of the instrument you wish to edit.
- In the AMP section, use the [LEVEL] button to adjust the level of the individual instrument.