Factory Reset Procedure:

Oberheim Matrix-6:

Pressing the STORE button while powering up (factory reset). Then, download the factory patches as an mp3 stream that do the trick.

Yamaha S90:

WARNING: All user stored data will be deleted. If the current settings and data are not expendable, create a backup before executing the Factory Reset procedure.

1) Press the [UTILITY] button.

2) Press the [JOB] button.

3) Press the [ENTER] button.

4) Press the [INC/YES] button.

Yamaha MU90

Turn the power OFF, then Power ON while holding UTILITY & ENTER.

Roland U-110

hold the edit and part buttons and power on. / To reset this module to its default settings hold down [part/jump] + [edit/exit] when turning the unit on.

Roland DEP-5

memory no up and down + power on