The TD-30 has a MIDI transmit and receive switch for each of the its parts which can be turned on or off as desired. When it is on, MIDI information will be transmitted and /or received through its MIDI ports or USB port. By default, this switch is set to "ON."
Here's how to access the MIDI TX/RX switch for the Drum Kit part in the TD-30.
1. Press SETUP.
2. Press F5 to choose Setup menu "B."
3. Press F3 (MIDI).
4. Turn the dial to turn the DRUM KIT TX/RX receive switch ON or OFF.
5. Press EXIT when you're finished. The new setting is saved automatically.