That the stars give off melodic sounds is quite well known today; we know that the composer, Holst, wrote themes connected to the stars and planets, and thus knew this concept well. What is not so well known is that our Anglo-Saxon Ancestors would also have known of this phenomena. As usual, we have no written records or details, and in this instance we will have to rely upon our English Word-Hoard to find the truth of the matter.
The clue to this ancient knowledge lies in the Old English words related to the heavens -
radur - OS
rodor - OE
heofentungol - OE
rodortungol - OE
The clue here lies in the word tungol which means 'tongue' and relates to the idea of 'to quiver', or 'flicker'. The stars do 'quiver' or 'flicker' as we all can see, but the term 'tongue' suggests sound since this is the means we utter sounds from the mouth. It seems that this must refer to the 'Sound of the Stars', a phenomena known to our English Ancestors.
The root of the words radur and rodor is *rad-, clearly connected to the Rad-Rune; in this instance it is connected to the 'Sound of the Stars'. We have the word 'radio' to tell us that this is indeed connected to sound, as well as movement and rhythm.
Some people who have experienced 'OBEs' (out-of-body-experience) have stated that they hear sounds associated with different levels of consciousness attained during such an experience. Different 'spheres' have different melodies, it would seem. Music of some sort was used in ancient rituals, chanting, incantation, etc. There is also a subtle link between the idea of sound, rhythm, and measurement, as well as vibration and energy.