Over the years, I've been thinking I should really make this project easier to finish.
The two main issues have been the awkward meachnics of fitting the original switches and knobs and the challenge of conjouring up a 49 output, velocity sensitive MIDI decoder.
The meachnics iossue could be resolved at stroke by moving to a set of new off the shelf compoenents.
Similarly there are several polyphonic MIDI decoders available from one company or another.
Therefore, I will continue this project on a simplest is best principle in order to finish it sooner rather than never.
j-Omega Electronics make a reasonabley priced MIDI decoder that will meer my needs.
j-Omega Electronics MPT8
The MPT8 has 64 outputs in an open-collector 'pull-down' arrangement. I'll be pulling up, from -7V, but to ground which is okay.
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