This project is currently unfinished, but will probably be released soon-ish.
You connect to it with BGB, and it will emulate a PS2 keyboard. (Hopefully for MIDI control.)
I'm still getting MIDI implemented, which I've been putting off for a while now since I'm lazy.
I also want to make a new font since the default TIGR one stands out like a sore thumb.
I'll post a download link when it's done.
It will probably just be a standalone executable.