TD-12, TD-12S: Assigning the MIX In to the Phones Output Only
Use the following steps to assign the MIX IN signal to the Phones output only:
1. Press SETUP.
2. Press F2 (OUTPUT).
3. Press CURSOR right (>) to select "MIX IN."
4. Turn the VALUE dial to move the marker to so it lines up with "PHONES."
5. Press EXIT when finished. The setting is stored automatically.