"In many a piece of music, it's the pause or the rest that gives the piece its beauty and its shape..."
...Pico Iyer
When you take a walk into the forest, open your ears and listen carefully, 'cause you wouldn't be alone there. You would hear the swishing, the rustling, the rumbling, the roaring, the whispering, the whooshing and the swooshing of trees and plants while the wind moves at certain speed and strength, and at different directions. The wind itself whistles through trunks and leaves; frogs make rhythmic chirping sounds; then the distant honking sounds made by owls. As if that would be all, then insects make loud stridulating sounds that could almost vibrate the air around. The birds are not left out, they would make a flute-like melodic sounds as if it were a human being.
What does this tell us? Nature itself has a voice, a sound, a melody.
Get a quiet place all alone by yourself, then take a deep breath and close your eyes for a moment. Ensure nobody is around to talk to you, yet you would still feel your voice or voices in your head, right?
These sounds could be as a result of things happening in your life: unexecuted plans, dreams, sometimes anxiety, and so on. But no, it's not always hallucination. You are perfectly fine. That's the sound: the voice that keeps echoing, from happenings around you, 'cause it's a part of you, it's a part of life.
Music had always been a part of life, not only to humans but even in the realm of immortality.
Now, let's read a portion of the Holy Book, and see for ourselves.
"Thou hast been in Eden the garden of God; every precious stone was thy covering, the sardius, topaz, and the diamond, the beryl, the onyx, and the jasper, the sapphire, the emerald, and the carbuncle, and gold: the workmanship of thy tabrets and of thy pipes was prepared in thee in the day that thou wast created.
Thou art the anointed cherub that covereth; and I have set thee so: thou wast upon the holy mountain of God; thou hast walked up and down in the midst of the stones of fire.
(Ezekiel 28:13, 14)."