MIDI Maestro


MIDI Maestro

MIDI Maestro enables Tandy Color Computer (CoCo) 1, 2, and 3, as well as the Dragon Data Dragon 32 and Dragon 64 computers access to the entire range of Musical Instrument Digital Interface (MIDI) capable musical instruments. MIDI Maestro offers improved operation, additional capabilities, and compatibility with previous MIDI interfaces.


  • Configurable Color Computer/Dragon emulation
  • MIDI In Support
  • MIDI Out Support
  • Auxillary Connector for configurable MIDI Thru or second MIDI Out Support
  • MIDI In, Out, Thru Indicators
  • CoCo Game Cartridge PCB footprint


  • One of:
    • TANDY Color Computer 1
    • TANDY Color Computer 2
    • TANDY Color Computer 3
    • Dragon 32
    • Dragon 64

MIDI Maestro can be purchased from RETRO Innovations in the following configurations:

  • A bare printed circuit board
  • A complete unassembled kit with all parts included
  • A complete finished PCB
  • A complete finished unit in an enclosure

MIDI Maestro+ will soon be available, which includes all of the MIDI Maestro capabilities plus support for RETRO Innovations FlashPak

Complete units come with a 30 day return policy and 1 year warranty.

Technical Details

MIDI Maestro comprises a Motorola 68B50 ACIA that resides at IO location $ff6e/6f ($ff74/75 on the Dragon) and operates at 500kHz from a 4Mhz oscillator. Using the /16 bps rate divisor, 8 data bits, 1 stop bit, and no parity, the unit transmits and receives RS232-framed data at 31.25kHz, the MIDI standard bps rate.

Supported Software

  • Coco MIDI Pro
  • Lyra
  • MFPlay
  • Ultimuse III

Project Files

Please visit https://github.com/go4retro/MIDIMaestro for complete schematics, pcb artwork, Gerber files, a bill of materials, and related files.

Frequently Asked Questions

None as yet