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Roland TR330

We’ve done lots of work to these and other drum machines. Mods have included the following

  • Individual output for drum sounds
  • Footswitch for metronome
  • Expression pedal for balance
  • MIDI Clock input
  • External Speaker Jack
  • Line Input

Here the inside with a new PCB added above the clock divider board to support the functions above.

New TR330 PCB

This is how we implemented the MIDI clock input

And here is a schematic and layout of the sound PCB. This was a couple of days work!