Roland Clan Forums

To change the Perform number, firstly Receive Bank Select needs to be turned on in System, then the JV needs to receive a Bank Select <number> message.

I don't know if the Korg can send a Bank Select message.

1. A colleague insists on Panasonic for electrolytic SMD caps and many low audio faults are related to inter-stage coupling caps in audio paths. 2. The pcb headers for the multi-wire connectors have an integral locking thingy which needs to be carefully prised upwards a millimetre or two for release...

Updating, shoehorned a Teensy 4.0 into the setup, needed the memory. Can now auto-detect added expansion packs. Simple, just select a Patch then read it's Name and look for << No Data >> indicates absent pack. Slow, need to wait about 500ms after selecting Patch before retrieving it's name.

The space between IC24 and R88 looks like a good place to glue an SMD Tantalum cap, upside down. Suggest epoxy and use some fine ~320 grit emery to rough up the area a little, enough to de-glaze the surface. Think carefully about orientation before you stick it down.

Yes and I'd gladly swap it for a JV-1010. Unfortunately I'm in Australia.

What part of the world are you in?

It just takes a little time for the synth engine to instantiate a change of Patch (Program), Tones 1 - 4 or EFX type. 50ms usually works for the first two, EFX requires a little longer like 80ms so get your DAW to send a Program Change at least 50ms before sending the first Note message should do th...

From the XV-88 user manual's Midi Implementation it looks like it's Sysex header is
F0 41 10 00 10 12
Whereas the XP-30's header is
F0 41 10 6A 12
Hope this helps.

Thank you again. No problems here with Checksum, is calculated and inserted on the fly. I'd overlooked ScaleTune, kind of shelved until V2 hardware based on Teensy 4.1's more memory. Have got auto-detect synth working as much as it can, just cannot discern an XP-30 from a JV-1010. Does not seem poss...

My workshop is in storage so left the mainboard out of my almost dead XP-50 with a colleague for repair today. Almost dead means the display and everything Midi worked, just had weak crackling audio. A quick probe with a cap tester indicated that most are "dry". A few thoughts from the dis...

Hi @vsyn7425. To get my project to send patch data wrt targeted synth's timing requirements, commands to request Patch Common and the four tones are basically handled by a sequencer as individual request messages. Can reproduce what you are seeing with SendSX if requests are sent too rapidly. Experi...

Thank you @Foksadure for those tips. Figured out how to deal with Roland's two, three and four byte parameters in Arduino's C from the perspective of which Bits need to go where.

So far so good, have the basics of auto-detect / configure working, now for the details.

Relevant to my project the patch sizes are important , made easier to see:- SysCom PerfCom PrefPart PatchCom JV-1080 28 40 13 48 JV-2080 62 44 1A 4A JV-1010 66 42 19 4A XP-30 66 42 19 4A XP-50 52 42 19 49 XP-60-80 60 42 19 49 Values are in HEX. The synth can only give what it has so a GetAllUserData...

Must admit, I don't grasp that Changeit request string either, not saying it's wrong- just something to learn more about. Have tried a few JV editors but mouse drags and clicks are just not a control surface and I want to play the JV synth engine like an instrument while a couple of arpeggiators and...

Caps perhaps. Had similar with a JV-1080, if you edited anything in a patch and tried to save your work it would revert to the un-edtied instance. Replacing Power supply caps fixed it. Ok, your hardware is different, but caps still wear out and when stuff is written to Flash, it can gobble big spike...