I had forgotten just how relatively simple things were, so I had contemplated re-writing the ROM to put out CC values for each of the parameters as there are only a few (much less that 127) and it would work seamlessly with the BCR.
From the Internet, I gather the ROM is a bit of a mess and there is someone else re-writing it following on from Fred Vecoven's work on the similar JX10. So perhaps I'll wait.
In the mean time, for the editor I decided to go the iPad way.
I have an old iPad 2 and I have a second hand Alesis iDock which works well, but the poor engineers at Alesis couldn't (or wouldn't) work out how to send sysex. Very secretive about details and not very forthcomming with help. No more Alesis for me.
I could have bought a simple iPad Midi Interface, but I had a rush of blood to the head and bought a factory refurbished (looks new to me) Behringer iStudio iS202.
Slid the iPad in. Popped the iStudio on the JX-8P (a bit bigger that the Alesis unfortunately)
Grabbed copy of iPG-800 from the App Store and all is good.
The JX-P8 not only puts out a patch change message, but dumps it's very small sysex patch data every time you press a patch select button the synth. (Sysex out has to be on)
This is lucky because you can't call the current patch sysex remotely.
It is great to have a semi analog again as I missed my Jupiter 8 nearly as soon as I sold it to buy a DX7.
Believe it or not I bought the JP8 new with a bank loan when I was a uni student - who lends to a student?
Paid it off gigging and pouring beers in a pub.
So far the JX-8P setup has proved to be very enjoyable.
All the best
Royce