Ahhh.. Pythagoras' harmony of the spheres!

"Because the Pythagoreans thought that the heavenly bodies were separated from one another by intervals corresponding to the harmonic lengths of strings, they held that the movement of the spheres gives rise to a musical sound called the "harmony of the spheres."

Also, Keper (1618). According to Kepler, the connection between geometry (sacred geometry), cosmology, astrology, harmonics and music is through musica universalis. Kepler discovered physical harmonies in planetary motion.

This wasn't just about creating beautiful music, like many thought Pythagoras was trying to do. It might be that he was talking about actual sounds in space appearing as stars.