MIDI PROGRAM CHANGE FILTER

 

This unit allows the use  of a synthesiser/keyboard as a "master program selector" without the notes played on the main keyboard transmitting to a secondary synthesiser/module.

 

The MIDI Program Change 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.

 

	MIDI Program Change Filter ITEM#: MIDIPROGCHANGFILT PRICE:  €35.00

 

The MIDI Program Change Filter unit utilizes:

 

• A Miduino kit including a suitable pre-programmed Atmega168,
• A 2.1mm power socket, and associated LED, 
• A MIDI detection LED,
• A MIDI 5-pin DIN input socket,
• A MIDI 5-pin DIN output socket, 
• The circuit schematic is available,.

 

 

The MIDI Program Change Filter  requires:

 

• A 9 Volt battery or equivalent 9 Volt DC power source

 

Operation:

The unit detects the incoming MIDI data and if the data is MIDI Program Change then the MIDI data is transferred to the MIDI output.

 

However if other MIDI data is detected, it is filtered out and it is not transferred to the output, including any non-channel events are filtered out. So any System Common, Realtime or Exclusive events are ignored.

 

Assembly:

The assembly is straightforward and well documented. This design does not include a USB chip, it is designed to use a FTDI USB 232-TTL cable to program the microcontroller.  However since the cable plugs directly into the Miduino, you can use one cable for multiple projects.

   

MIDI Wiring:

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.

 

Download:

Open the  source code file and copy and paste it into the Arduino programme and save it as a .PDE file.

 

MIDI Specification: 

The MIDI Program Change Filter does not change the incoming MIDI channel (1-16). The system will also work with MIDI running status.