This is a quick demo of microtonal Gameboy synthesis – 18-TET Tuning with NanoLoop (Hacked ROM).

via littlescale:

18-TET = 18 divisions of the octave instead of 12 (which is standard for western tuning). Special, special thanks to Abrasive for his help and his idea with this – all of the credit goes to him of course. On left, the original ROM with its frequency lookup table intact, and on the right the edited ROM with the 18-TET lookup table.

Demo 2