"In all things, which are
derived from the vibrations and formed
by them, sound is hidden, like the fire in the flint; and every atom in the universe confesses with its tone: My sole origin is sound. If any solid or hollow body of sound is struck, it gives the answer: I am sound.
In the Vedas, this means -
" Nadabrahma the world is sound."
Hazrat Inayat Khan