SYNTH-MIDI-CV4-01

Features

• Convert MIDI messages into Control Voltage outputs
• Adapted from HAGIWO's MIDI to CV module
  • Translate from Japanese to English using browser
  • Removes Digital Outputs
  • Has 4 Analog Outputs instead of 2
• XAIO RP2040 CPU
  • Arduino MIDI library has not yet been ported to Pico so will need to use CircuitPython
• MIDI In
  • Standard MIDI Jacks
  • MIDI out jack for future functionality
• (4) 0-5V Analog CV outs
  • MCP4822 12-bit D/A - SPI Interface
    • (2) MCP4822 Datasheet
  • Use with SYNTH-VCO-01
    • CV_1 = V/OCT
    • CV_2 = MOD
• Standard EuroRack 16 pin header
  • Supports 12V in with on-board 5V regulator
  • 5V regulator can be not installed if 5V is available on EuroRack connection
• Card is not a Eurorack card
  • Probably too deep, needs cabling
• (6) 6-32 Mounting holes
  • Stacks with SYNTH-VCO-01 card

Reference Docs

• adafruit_midi CircuitPython API
• MIDI Communication
• elkayem midi2cv GitHub page _ Nano based project
  • Arduino MIDI library has not yet been ported to Pico so will need to use Python
  • Drives 4 CV outputs: Pitch Blend, Control, Note, Velocity
  • This card only drives Note (Voltes/Oct, Mod)
• MIDI Controller in Python
• Principles of Voltage Control
• Creative Control Strategies: MIDI to CV
• EuroPi
• Eurorack Beginners Guide
• Eurorack Wiki page
• PicoPicoSynth

Software

• SYNTHMIDICTL01 - Arduino Software

Videos

• Similar design

Assembly Sheet

• SYNTH-MIDI-CV4-01 Rev 1 Assembly Sheet