COLLET INSTRUMENTS

MIDI2USB CONVERTER

Get Started with MIDI 2.0

  • The MIDI2USB CONVERTER is a converter that bridges MIDI 1.0 (TRS MIDI) and MIDI 2.0 (USB MIDI 2.0), translating between the two in both directions.
  • Connect your existing MIDI 1.0 devices to your PC as MIDI 2.0 devices.
  • Ideal for software development using MIDI 2.0.
  • https://github.com/collet-instruments/MIDI2USB-Converter

Usage

Using USB MIDI 1.0 Mode

  • Switch SETUP (SW1) to MIDI 1.0 and connect the USB Type-C port (J1) to a USB host
  • The red LED (D5) will light up
  • MIDI packets received at the MIDI IN port (J3) will be sent to the USB host
  • Similarly, MIDI packets sent from the USB host will be output to the MIDI OUT port (J4)
  • Data transfer status can be monitored via indicator LEDs (D2, D3) for both MIDI IN and MIDI OUT ports

Using USB MIDI 2.0 Mode

  • Switch SETUP (SW1) to MIDI 2.0 and connect the USB Type-C port (J1) to a USB host
  • The blue LED (D6) will light up
  • MIDI packets (MIDI 1.0 byte stream) received at the MIDI IN port (J3) are converted to USB MIDI 2.0 UMP (Universal MIDI Packet) and sent to the USB host
    • At this time, MIDI 1.0 Voice Messages are extended to MIDI2.0 Protocol (UMP Message Type 4)
    • Similarly, MIDI 2.0 UMP sent from the USB host is converted to MIDI 1.0 byte stream and output to the MIDI OUT port (J4)
      • Since MIDI 2.0 Protocol sent from the USB host is converted to MIDI 1.0 Protocol, some data may be lost
  • Data transfer status can be monitored via indicator LEDs (D2, D3) for both MIDI IN and MIDI OUT ports
  • Some operating systems do not support USB MIDI 2.0 drivers, in which case MIDI 2.0 mode may not be available. Please use MIDI 1.0 mode in such cases.

Caution

  • The IN/OUT terminals of this product are TRS MIDI Type-A only. Do not use other types of cables.
  • Make sure not to confuse IN and OUT connections. Incorrect wiring may cause reverse current and damage your equipment.
  • This product is designed for USB Type-C 5V power supply only. Do not apply any other voltage.
  • The product may be damaged by static electricity. Please handle with proper ESD precautions.
  • Modifications or improper soldering may cause malfunction or accidents.
  • Do not use in environments with high temperature, high humidity, direct sunlight, or condensation.
  • Compatibility with all MIDI devices is not guaranteed.

Disclaimer

  • This product is provided for electronic hobby, educational, and research purposes.
  • It is not a consumer-ready product and has not been certified under any safety standards or regulations (such as PSE, Radio Act certification, CE, UL, etc.).
  • By purchasing and using this product, you agree to the following terms:

Use at Your Own Risk

  • We accept no responsibility for any damage to equipment, personal injury, fire, data loss, or any other loss or accident resulting from the use of this product.

Limitations of Use

  • Do not use this product in industrial equipment, medical devices, safety systems, or any other applications where human life or property may be at risk.
  • Continuous long-term operation or use under heavy loads is not intended.

Modification and Connections

  • We are not responsible for any malfunction or damage caused by modification of this product or connection to unintended devices.

Returns and Warranty

  • If a manufacturing defect is confirmed, we will provide a replacement or refund.
  • No other warranties or guarantees are offered.

Modification and Collaboration

  • This product is provided as open hardware.
    You are free to modify, reuse, or build upon the circuit and firmware.
    However, we cannot guarantee the operation or safety of modified versions.
  • We welcome contributions from developers and users who wish to improve the design.
  • Please feel free to share feedback, modifications, or enhancement ideas.

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