DR-660: Checking the ROM Version April 12, 2023 08:50 Updated Follow The following procedure can be used to check the ROM version: 1) Power on while holding SONG and button #7. Related articles DR-660: Synchronization DR-660: Initializing - Restoring the Factory Settings DR-660: Recommended Power Supply DR-660: Program Change Receive On/Off DR-660: Assinging Midi Note Numbers to the Pads