It's software used to create music. Typically you build sections that you loop and intermingle. It's kind of like writing small sections of sheet music for mult

It's software used to create music. Typically you build sections that you loop and intermingle. It's kind of like writing small sections of sheet music for multiple instruments at a time, but unlike many Midi composers, the notes aren't shown as notes. It's basically what came after manually programming all the chiptunes as part of the game's code. Instead using general parsing of a format that described the audio in terms of pitch, volume, dropoff, echo, etc. of samples (at least samples were usually used with later trackers anyway).