Good luck! Replacing the ROM chip with something newer (either stock 1.8 or the french superMax board on ebay) sounds like the way to go.
jb
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Am 19.11.2019 um 21:34 schrieb Florian Heer <yamahadx@...>:
So, I was barking up the wrong tree, the DX7 was not (well...) to blame, it worked exactly to spec. Great to know.
