MIDI to TRS box (MTR-5) is a product designed by DOREMiDi to convert MIDI five-pin DIN interface into TRS interface. The MTR-5 can convert one MIDI input into five TRS outputs. The TRS interface of the MTR-5 has five type selector switches, which are compatible with the TRS interfaces of different instruments. The MTR-5 has a built-in high-speed opto-isolator to protect the instrument interface and transmit MIDI messages quickly.