Developing Ruby code to drive antique synths with MIDI pitch bend messages.  This is a Roland D-110 coupled to a Roland U-110.  Each MIDI channel can only play one note because MIDI pitch bend affects the whole channel.  The audio track is monotonous, but useful for ringing out the instruments.

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2 Comments

  1. Hi Mike. There’s a little USB Midi gadget that connects my computer to the D-110. I take the Midi Thru output from there to the U-110. The audio from both synths goes into the mixer, and the Tape Out jacks run from there to the Zoom recorder.

    Since pitch bend affects all of the notes in a channel, I can only play one Bohlen-Pierce note in each Midi channel. The U-110 is handling channels 1-6. The D-110 is handling channels 7-12, plus percussion on channel 15.

    If you want to decipher exactly what’s going on musically, read the Ruby file rehearse.rb on the TechAcademy Github page. This isn’t really a composition – it’s just putting some repetitive phrases in each channel to test the underlying classes and the hardware.

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