Fascinating! You can definitely hear the basis for the modal system of melody in this (which had it's origin in ancient Greece and was used in plainchant.
I don't know if it's written in the music, but the interpretation also includes a style that was called Organum in Europe and didn't develop until the Middle Ages. It's where you hear a pedal tone (just one sustained pitch) on the lower strings while the melody continues above.
Thanks for the ping,
@Suppressed ! I learned something today! ^-^
Edited to add - Organum is considered the earliest polyphony.