The reason that starfall_island is track “xx”, rather then numbered, is because it uses 3 Game Boy chips side-by-side, rather than the single chip that other tracks on the album use. This was an experiment in seeing whether adding more layers would create a more satisfying sound, while still keeping the lightning-fast workflow of Game Boy tracker composition.
In this result, the extra layers actually ended up just providing some nice extra harmonics to fill out the atmosphere around the strong core. This track could still probably be played on a single chip, but the sounds themselves would likely feel less harmonically layered.
Also, having extra layers did diffuse the energy still a little bit – which does go to show that strict creative limitations can be incredibly powerful.
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_software: furnace-tracker [3x gameboy]
_download: xx-starfall_island.wav
_source: xx-starfall_island-SOURCE.zip
_license: public-domain / cc0