Originally crafted as a background for improvisation, MYST is phrygian.
Phrygian in music that is. We’re not talking about the region in Anatolia.
Hmm, I don’t know how widely known this following fact is: Did you know that the modes of the major scale were named after regions in ancient Greece? (Or the whole story is a bit more complicated but, still…) The modes (that are also scales derivated from the major scale) being Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian and Locrian.
This is something that every musician out there knows.
Now you know too. Welcome to the club!