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CONTENTS

Unit-MIDI

SKU:U187

Description

MIDI Unit is a channel control and audio synthesis unit based on the MIDI interface. The switch on the front of the product allows you to set the left/right MIDI port's bypass mode. In Bypass mode, the left and right ports are directly connected; in Separate mode, the left and right ports are separated. The left and right MIDI ports support both standard 5-pin DIN and 3.5mm headphone interfaces. The TXD pin on the Grove port is connected to the left MIDI port signal, and the RXD pin on the Grove port is connected to the internal audio synthesizer's SAM2695 digital input. This allows an external M5 host to monitor or output MIDI signals through the Grove interface while simultaneously outputting synthesized audio. The audio signal is output through a 3.5mm headphone jack. This product is suitable for electronic music creation and production, live music control, and interactive music installations.

Pattern specification
Separated Mode:
Unit MIDI RX (Controller's TX pin) is connected to the SAM2695 synthesizer chip and the OUTPUT interface.
Unit MIDI TX (Controller's RX pin) is connected to INPUT, but this pin is floating and has no function in this mode.
Bypass Mode:
Unit MIDI RX (Controller's TX pin) is connected only to the SAM2695 synthesizer chip.
Unit MIDI TX (Controller's RX pin) receives MIDI signals from INPUT, and INPUT is directly connected to OUTPUT.

Product Features

  • SAM2695 audio synthesizer chip
  • UART communication
  • Standard MIDI 1.0 protocol（16 channels）
  • Standard 3.5mm audio jack and DIN socket
  • Optocoupler isolation
  • Bypass/Separate mode switch

Includes

  • 1x MIDI Unit
  • 1x HY2.0-4P Grove cable (20cm)

Applications

  • Electronic instruments
  • Live performance equipment
  • Music education and research
  • Interactive music installations

Specifications

Specification Parameter
MIDI Chip SAM2695
Communication Protocol Standard MIDI 1.0 protocol （16 channels）
Polyphony 64-voice (without effects) / 38-voice (with effects)
Communication Interface UART (Baud rate: 31,520 bps)
Audio Output Interface 3x3.5mm stereo headphone jack + 2xDIN 5-pin socket
Standby Current DC5V@18.59mA
Operating Temperature 0-40°C
Product Size 48*40*25mm
Package Size 136*92*26mm
Product Weight 28.2g
Package Weight 33.4g

Schematic

schematics

Pin Map

Unit MIDI RXD TXD VCC GND
Core(Basic) G16 G17 5V GND
Core2 G13 G14 5V GND
CoreS3 G18 G17 5V GND
CoreMP135 PH8 PF11 5V GND

Module Size

module size

Examples

Arduino

Video

  • Unit MIDI product sample introduction

  • UIFlow2.0 MIDI Unit