Soft Thru causes the MIDI data received at MIDI IN 1 to be re-transmitted at MIDI OUT without requiring a separate MIDI THRU port. Use the following procedure to change the MIDI "Soft Thru" settings of the A-50/80:
1. From power up, press the appropriate soft button to choose UTILITY.
2. Press the appropriate soft button to choose MIDI.
3. Press EDIT.
4. Press the INC button to remove the "write protect" if necessary.
5. Press EDIT so it is lit.
6. Use the third slider to change the SOFT THRU value to ON.
