XXXXXX (six digits) or XXXXXX-XX (six digits + region suffix)
The serial number is often relevant when performing maintenance or upgrading firmware. To check your M1's internal software version: Turn the power . Press and hold the [INT] button. Turn the power ON . Korg M1 Serial Number
For software-related versions (like the M1 Le ), the serial number or product code is found on a black piece of paper or a KORG Software Bundle PIN card included in the original manual bag. 2. Serial Number Format & Dating XXXXXX (six digits) or XXXXXX-XX (six digits +