In his great work To Heal the Soul, Rabbi Kalonymus Kalman Shapira wrote that all humans each have their own unique musical ladder -- a distinct melody that allows one to draw down spiritual sustenance into this world. This melody is exclusive and in essence can not be performed by anyone else. He believes that it is so individualized that to use someone else's ladder is like putting someone else's saliva into your mouth to sing. This concept is so ubiquitous, so universal, that Rebbe Nachman of Breslov went as far as to say that each and every blade of grass has its own unique melody as well.
For more reflections on jazz and spirituality from an Islamic perspective.
all that jazz...
the writings of yusef lateef
the philosophy of ahmed abdul-malik