MIDI Channel Filter


The MIDI Channel Filter can be used to reduce MIDI throughput by removing MIDI System mesages. Also it allows one channel to operate a particular sound module/synthesiser, while filtering out the other MIDI channel data. Note that this unit operates via the MIDI IN and OUT sockets only and not through the USB connection.


The unit detects the incoming MIDI data and if it is a MIDI channel command, which corresponds to the DIP switch MIDI channel (1-16) setting, the device will pass only data on that selected channel and discard data on all other channels.

If any System Common, Realtime or Exclusive events are detected they are passed directly from the input to the output. System Exclusive messages will be sent until the End of System Exclusive message is received. However if a system realtime message is received during a System Exclusive message it is also passed to the output.

Power Supply:

External power can come either from an AC-to-DC adapter or battery. The adapter can be connected by plugging a 2.1mm center-positive plug  into the board's power jack.

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.

MIDI Channel Selection:

The MIDI Channel Filter commands are all channel (1-16) dependent. The system will also work with MIDI running status.

DIP Switch Selections



4 3 2 1
on on on on 1
on on on off 2
on  on  off on 3
on on off off 4
on off on on 5
on off on off 6
on off off on 7
on off off off 8
off on on on 9
off on on off 10
off on  off on 11
off on off off 12
off off on on 13
off off on off 14
off off off on 15
off off off off 16

Table 1 MIDI Channel


The MIDI Channel Filter Unit consists of:
  • An assembled, built and tested Arduino board including a suitable pre-programmed microcontroller,
  • The MIDI channel (1-16) is user selectable via the 4-way DIP switch
  • A 2.1mm power socket, and associated LED,
  • A MIDI activity LED,
  • An assembled, built and tested MIDI In/Out Board,
  • A 150mm wired MIDI 5-pin DIN input socket,
  • A 150mm wired MIDI 5-pin DIN output socket,
The MIDI Channel Filter Unit requires:
  • a 9v battery or equivalent DC power source


The MIDI Channel Filter Unit Resources:
MIDI Channel Filter

ITEM#: MIDI Channel Filter

PRICE:  €54.95

After clicking on the 'Add to Cart' button, just complete your order on the Paypal site, where you can select the required quantity. Also the appropriate shipping cost is calculated and added. However you may still cancel or adjust your order, at this point.