Voyetra V-4001 MPU 401 Compatible MIDI Interface Used

The original MPU-401 compatible interfaces from Voyetra (nee Octave-Plateau)
The interfaces consisted of an 8-bit ISA card with an appropriate Connector
Box (25 pin port).

The V-4001 was manufactured 1986-1989.
The CB-4001 (Connector Box) provided Midi In, Midi Out, Smart FSK In & Out,
Metronome Out, and toggle switches. *> The Connector Boxes for the OP-4001
and V-4001 are different, as one is a female connector and the other a male
connector.