To add to the neighbor comment: trackers were around since the late 80s or early 90s, popular on computers like Amiga, and the interface was suited for low-res or even text-mode graphics. E.g. there's a tracker for Gameboy, called ‘LSDJ’; and a similarly restricted alternative for Android is Nanoloop: https://play.google.com/store/apps/details?id=com.nanoloop (at least afaik it's a tracker).