For GM / While holding down [SELECT] press the right arrow PART button.
For GS / Whil eholding down [SELECT] press the right arrow INSTRUMENT button.
If you perform this operation in Double Module mode, The display will ask "Init GS A,
Sure?" Use INSTRUMENT left or right buttons to specify which module A or B will be
Initialized
To initialize, press [ALL]. To quit without initializing, Press [MUTE}>