Yes, the sounds caused by the movements of the celestial spheres is what the term describes. Its credited to Pythagoras apparently. I don't actually know if this is what I've tapped into, but I recently heard others describing having similar experiences to what I outline in my post, and they...

I'm writing this post to hopefully guide fellow SS to a recurring experience of mine, which is to gain access to what I've heard people refer to as "Music of the Spheres." This music is a variety of harmonious melodies which can be heard in a state of meditation, and it is extremely beautiful...

Devi is the feminine word for "god" or "divine" in sanskrit. What you are referring to are the siddhis.