TK. Posted June 10, 2007 Report Share Posted June 10, 2007 The easiest and most secure way to MIDIfy a vintage poly synth is the use of reed relays. This has been proven today by Francois and me :)View with removed frontpanel - each key has a seperate pin, which is connected to -15V when the key is pressed.In parallel to these key->gate board connections, Francois has led through the inputs via ribbon cables:The backside of the synth with a nice view to the voice boards (sorry for the bad picture quality!)Core Module + 6 DOUTs stuffed with reed relays. Schematic can be found here: http://www.ucapps.de/mbhp/mbhp_doutx1_reed_relays.pdfThe bottom of the vero board:After two hours all cables were soldered and tested. First checks with a MIDI keyboard and with MBSEQ V3 were very successfull! :)Hard to believe, but this was only the first of three Polysynths which should be MIDIfied! ;-)Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
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