The Singular Sound Breakout MIDI Cable for G2M (Version 3) converts the MIDI out of the G2M into a MIDI out and a MIDI in. The MIDI out is essentially a through, so you can continue to connect the G2M to your synths. The MIDI in lets you send MIDI controllers to the G2M to control your performance. The cable supports MIDI hold, sustain, and volume MIDI messages.