The Original Pixelh8 Music Tech Game Boy Synthesizer is a cartridge that fits into an unmodified game boy, letting you control the Game Boy’s on-board sound. You can edit the wave duty, pitch sweep and volume envelope as well as new additions such as unison, 5th power chords and octaves.

This updated version V2.0 allows for the addition of a Major 3rd, a Minor 3rd as well as All Major Keys, All Minor Keys, All Harmonic Minor Keys, All Whole Tone & All Pentatonic Keys.

As they say - that’s a lot of keys!