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MIDI Volume 16 Channel Mixer


MIDI Mixer

This MIDI project, utilizing the MIDI Arduino design, allows  individual control of MIDI Volume on the 16 MIDI channels, using 16 potentiometers.






MIDI Mixer 16 Channels


PRICE:  €70.00








The MIDI Mixer Controller unit utilizes:

  • A MIDI Arduino including a suitable pre-programmed Atmega microcontroller,
  • A MIDI IN/OUT board,
  • A 2.1mm power socket, and associated LED, 
  • A MIDI 5-pin DIN intput socket,
  • A MIDI 5-pin DIN output socket,
  •  0.1" pin-terminal inputs/outputs,
  • The circuit drawing is available,
  • MIDI available/transmit LED



The MIDI Mixer Controller also requires:

  • A 9v battery or equivalent DC power source
  • 16 off 10k linear potentiometer



The MIDI IN data is passed through to the MIDI OUT socket.

A MIDI Volume control signal is transmitted, to the MIDI OUT socket, when a variable potentiometer is adjusted. This MIDI Volume command is channel (1-16) dependent. The MIDI channel, that the volume controller affects, is set by one of the 16 potentiometers. Potentiometer 1 controls MIDI channel 1,  Potentiometer 2 controls MIDI channel 2,  Potentiometer 3 controls MIDI channel 3, etc.


Circuit Schematic:

A circuit drawing of the MIDI Arduino board  shows the connections for the 16 potentiometers to the 16 Analog inputs (A0 to A15). 






     *Click to Enlarge*

The MIDI IN and OUT connectors use  5-Pin 180 degree DIN sockets. Note that the MIDI IN/OUT wiring is polarised and the correct pins should be used.






Power Supply:

The  MIDI Arduino board can be powered via the USB connection or with an external power supply. The power source is selected automatically.


External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The adapter can be connected by plugging a 2.1mm center-positive plug into the board's power jack. Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector. A low dropout regulator provides improved energy efficiency.


The board can operate on an external supply of 7 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 7 to 12 volts.