Hmmm . . . my troubles may coincide with the April date. When the issue first cropped up, I tried various things, none of which worked, and gave up in disgust. The GR-33 sat there for quite a while before I gave it another try. So it might have been April.
Are you having any MIDI issues with your GI-10? Fortunately (I guess), the GR-33 works just fine in audio, so I can still record with it and play live with it. But what I like so much about MIDI is that I can get in there and edit all the little oopses and slips, and even add to the track. This to me is the true power of analog to MIDI, such as the GR-33 does. I think I'm gonna order one of those Roland adapters as a last resort. I've run out of all other options. It would be a relief it it were the Midisport and not the GR-33. But it will unfortunately mean that the Midisports I own will be piles of useless junk until M-Audio comes up with new drivers -- if ever.
I'm glad to read about your successes with MIDI Guitar. I have an old M-Audio Delta 66 card (4 in 4 out audio, 2 in 2 out SPDF) that has always been extremely fast. I've been able to get latency down to as low as 6ms, using the good ASIO drivers. Right now, for some reason, ASIO4All is loading its drivers for my card before the card can load its own ASIO drivers. Dunno if I care much for that. I've discovered in the past that ASIO4All likes to latch onto things, and then not let go. There have been times I've uninstalled it for that sort of behavior. Only reason why it's installed right now is I was trying out an Alesis iO2 Express interface to see if I could get the GR-33 to work with it (it has MIDI ports). But nope. Had to install ASIO4All to get it to run, and I haven't bothered with uninstalling it (yet).
My system has Melodyne installed as part of the Sonar Installation, but I've never known what it was for, so I haven't done anything with it. Now, audio to MIDI conversion is definitely something I can use. And I play polyphonically when I play guitar, so I guess I'd need to use the editor. Besides there are some old standard recordings I'd like to see if I could convert to MIDI. So I'll have to give it a look-see. But as far as playing back some tunes I've written that have GR-33 MIDI parts, that might be beyond its capabilities?