• autoy

    Yes for a commercial project of this! Do you think it would be feasible to make a voice expansion project using clone JP4 cards to upgrade existing machines? Cheers.

    June 12, 2018
    • amsynths

      Hi, unfortunately its not very practical to add more voices to the JP4. There is nowhere to put them in the case, and the keyboard scanner only does 4 voices. It would be possible to build a 4 or 8 voice rack or boat synth using the new cards and the new patch programmer we are working on. Best Regards Rob

      June 17, 2018
  • Hi there,

    Just leaving my comment that if these cards ever became available I would probably be up for 5 of them for my tech to build.



    June 12, 2018
  • autoy

    I would buy 4 of them to make an 8-voice JP4 if someone can figure out an expansion. Perhaps a few more as backup.
    Best of luck with this project.

    June 16, 2018
  • autoy

    @amsynths definitely challenging but there’s a lot of air inside the JP4. I can think of at least a few ways to place more cards inside, at least a couple of them for sure. You are right about the key assigner though, it would have to be a new board altogether, like the one Lazlo Kovari is developing for IO V2 now. But 6-voice Jupiter-4? Where do I sign?

    June 18, 2018
  • Allie

    Also leaving a message to say I will buy 4 if made

    July 26, 2018
  • nice one Rob, think I might’ve been watching that JP4 voice board too 🙂

    Any chance you could measure the voice card for us? I had a card drawn up but had second thoughts as to the size of it.


    August 31, 2018
    • amsynths

      Hi, Jupiter 4 voice card is 195mm x 90mm and mine will be fitted to a Moog 60HP case….best regards Rob

      September 01, 2018
    • thanks Rob, I was pretty close in the end.

      September 01, 2018

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