Q: I have a MIDI controller connected to the Venom's MIDI input, but I am not able to play Venom's sounds from my external controller.

A: Press the Edit Button on the top panel of Venom.  Then press the A-flat below middle C on the keyboard (indicated as “MIDI Out” by the Global Key Mapping above the keyboard).  The LCD will show “MIDI OUT KEY”.  In this mode you will be able to play Venom from an external controller.