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Here is a new windows binary:

www.nanoloop.com/midi/nlmidi_03_win.zip

I tested this one with windows XP, too. On win XP (at least on the japanese one I have here for testing), the MIDI port does not appear as "nanoloop MIDI" but just as "USB MIDI port". If there are multiple ports on the system, you have to choose it manually.

You can set the throttling with -midi <value> where <value> should be roughly between 20 and 50. Default is 26.

That video is impressive but the music has a very shuffled rhythm which makes it hard to tell if there is some jitter caused by Arduinoboy's buffering.

I have experimented again with the adaptor, mGB and the following combination:

- GB pocket
- GBA
- Ableton Live lite on OS X

I created patterns in the sequencer for all 4 channels with lots of 1/32 notes. With the adaptor's default throttling, there were no issues as long as

- sync was deactivated,
- not more than one note was playing at once per channel (mGB plays only one note anyway),
- no continuous controller data were sent (edit pitch bend, volume etc only with the pencil tool).

I think the problem lies within mGB, it is simply not fast enough to process a full MIDI stream. When the throttling is too fast, mGB misses notes, when it's too slow, there will be jitter. You can only try to optimise the MIDI output as described above and then find the fastest rate with the throttling parameter at which mGB works reliably for you. I thought I had found this optimum with the preset throttling rate, but it turned out that it's slightly too fast for some setups.

I assume that Arduinoboy adds throttling, too. I asked trash80 about this and he said he doesn't know for sure but would try to measure the output.

Maybe someone can re-write the mGB code for MIDI processing in ASM. I'll also have a look at pushpin again, which was designed to work with real MIDI speed and should have no problems with the adaptor's input.

Syncing in MIDI mode is not recommended. If there is really nothing else than a clock signal, it may work for LSDj, but most likely not with nanoloop. Both take *any* signal for a clock. If a START message is sent, too, for example, the Game Boy is already out of sync. Plus you never know if the host app really just sends sync, there can always be some NOP SysEx bytes for testing for example.
I'll have a look at the nlmidi software later today. It should be possible to port it to any platform that supports the MIDI device.

So when you type ./nlmidi02 you get this nlcontrol output?

Hm. I don't make much profit with these. Maybe I should re-think the price, now that they have this extended functionality.

Re-uploaded it.

You can always set it back to MIDI / mGB mode, no need to "keep" it in that mode.