MIDI Program Changer

While playing electronic organ I often wished I could change the sound (in MIDI terms “program”) with a foot switch instead releasing the keyboard for pressing a knob (thus interrupting the sound).

Of course industrial MIDI Controlers are available. But they are pretty expensive so I thought about building one from scratch. Furthermore they change the program immediately, so if you have to be carefully timing the use of the switch during a break. My idea was that the program change should be delayed until every key was released. So while you are playing the final chord in the prelude you can change the program with your foot and start the first verse with a new sound.

image MIDI Program Changer

In the end I just wanted to play around with MIDI again after 30 years – when I built mit first MIDI pedal controler with a 8051 microcontroller  to expand my Ensonic ESQ-1 synthesizer with a 13 key pedal as kind of organ. Since I have become familiar with the Atmel AVR 8bit microsontrollers during the last years I used that platform. Though I know Arduino a little bit I preffered “real” programming with  AVR Studio and the Atmel ISP.

This is the hardware and software architecture:

image

 

to be continued…

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2 Kommentare zu MIDI Program Changer

  1. Werner Sengpiel sagt:

    Der Signal-Fluss ist allgemein logisch und vielseitig brauchbar – aber entscheidend ist der Code des Interrupt gesteuerten Midi-I/O. Hier wäre eine Hilfe sinnvoll aus der die Implementierung auf den konkreten Controller möglich ist .

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