To be a bit pedantic, those recordings are played at real time for normal speech, and have gaps between anything being played of centuries. They don't play continuously for that long, unlike this project which does play continuously.

Something you realise about a melody is its not about the notes, it's about the intervals. Nor is rhythm about the time at which it is played, rather it is about the relative time between events. So you could argue the music is only really happening when things change, as they did on this day. So I see this more as a time capsule similar to Seldon crises rather than a piece that is continually playing, but your interpretation can be different. Cage's 4'33" certainly challenges my interpretation.