I found this as well. Also, if you accidentally play the MIDI with the DMG off it changes brightness along to the notes 
17 Dec 2, 2012 9:32 pm
Re: Nanoloop USB MIDI adapter makes backlight glow. can it damage stuff? (14 replies, posted in Nintendo Handhelds)
18 Aug 17, 2012 3:30 pm
Re: Mixer Project Update and Questions (UPDATE) (21 replies, posted in Other Hardware)
This sounds so cool 
at the moment are you planning to have 4 stereo channels?
19 Aug 12, 2012 1:00 pm
Re: My little project; Sibelius-type program for Gameboy. (33 replies, posted in General Discussion)
This sounds incredible I have absolutely no idea whats possible but could you potentially have a looping function? I guess primarily for live, so if you preset a tempo and loop length then it loops round recording each time so you can have a sort of additive progression.
So you might set 120bpm + 8 bars, then it will loop, so you could start with the kick, then move on to other sounds to build it up in real time. Its kind of the way I've started to use nanoloop, although with piano roll (or stave) you'd have more scope as you could in theory have a really long progression loop rather than being limited to the 16 nl grid notes.
I'm not sure how easy that would be to do with the d-pad as you might not be able to input notes fast enough (works well on nl for iphone because of the touch screen so its much faster), but if we managed to get an external controller, maybe similar to LSDJ keyboard then it would be easier? ..or even using a midi piano keyboard and an arduinoboy to control it?
I have no idea if that made sense, but yeah
20 Aug 11, 2012 5:22 pm
Re: MIDI-USB adaptor (234 replies, posted in Nintendo Handhelds)
ah! thank you I'm glad I'm not alone. I'll try and dig it out my Abelton Lite copy and give that a go
Thanks, I'll give you a shout if I work it out as well, I'm starting a music production degree next month so if we haven't cracked it by then hopefully the tutors will be able to work it out
21 Aug 10, 2012 8:23 pm
Re: MIDI-USB adaptor (234 replies, posted in Nintendo Handhelds)
Hey all,
I'm new to this, so obviously I pretty much have no idea what I'm doing haha
I got hold of the adapter and used it to upgrade my cart to 1.63 and load mGB onto the space, that all worked fine (using OSX)
The issue is I can't seem to get mGB to respond to the midi coming out of my computer.
Logic seems to be sending the data out through the adapter.. as far as I can tell :s I've also tried all the channels (although mGB will only respond to 1-5, I think?)
I've also build an arduinoboy but its not with me at the moment and I only had half and hour or so to test it before I went away and left it :( but that didn't work with my midi keyboard either.
Is there stuff in mGB that I need to do to get it to respond or should it be ready to go on start?
Thanks for any help, I've been tearing my hair out trying to crack it on my own :)