> Tried that, MIDI input works (and the Miracle software picks up the inputs) but
> output just prints "MIDI out: packet assembly overflow, contact MAMEdev!" (everything
> works just fine in other MIDI programs so its not the keyboard or the USB-MIDI device
> as far as I can tell)
What version are you using (of MAME, and which system)? That hasn't happened to me in literally years.