Huh, that 2nd to last article almost sounds like Amiga mod files. You pieced together samples, often, um, “borrowed” from other mods, into song-specific selection, then included a list of which samples to trigger at which frequency at which time. For example, you’d include one bass drum and one snare drum, and instructions on how to arrange them into rhythms.

Xanadu as a DAW might look a lot like that, except with explicit and documented reuse of another person’s samples.