TerraTec MIDI Master USB - GM (General MIDI) Reset

14 MIDI Master USB (English)
feature by pressing “Bank MSB” and “Transpose” simultaneously and then pressing the “-”
key. This is confirmed with “NO” on the LED display.
GM (General MIDI) reset
Use this function to send a general MIDI reset.
Press and hold the “Bank LSB” and “Bank MSB” keys at the same time for at least 2 seconds.