Vintage Synth Repair

On Sun, Aug 1, 2010 at 6:25 PM, klosmon <klosmon@...> wrote:
>
>
> Hola-
> >I've come across a Prophet 5 rev 2 for servicing which has a Cooper MIDI interface.
> >This appears to be a simple board that goes between the keyboard and the P5 front panel; has MIDI In and Through (no Out),
> >and a channel select switch on the front panel. The ROM on the board is labeled "JL Cooper MIDI Keyboard Matrix 1.0".
> >
> >Does anyone have any knowledge of / experience with these? It looks like something they may have applied to other synths from that time as well. Operating instructions, hidden functions, whatever?

Sorry, have no experience with the JL Cooper MIDI Keyboard Matrix, but
since the original / early P5 units pre-dated Midi, its function is no
doubt to add a midi in & thru to the P5.  Its function is probably
limited to receiving midi data as an input to the P5, and provides a
midi channel select, so that it will filter out midi data from other
controllers sending data targeted to other instruments in the midi
chain.

--
John