The Memory of Whiteness: A Scientific Romance
Arthur Holywelkin, a brilliant physicist, devoted the last years of his life to creating a strange, beautiful musical instrument  called The Orchestra.  Hundreds of years later, in a universe centered around music, Johannes Wright is chosen as   the Ninth Master of Holywelkin's Orchestra.  Wright must travel the solar system pursued by enemies in the name of a destiny he understands only imperfectly.