Forbidden Frequencies - The Lost Chord by Jonathan Goldman

Talented blues guitarist, Christopher Shade, finds himself unwittingly entangled in adventure and intrigue when he discover the Forbidden Frequencies of the Lost Chord, a computer generated sound that carries within it the power to create inter-dimensional gateways, and thus the means to almost unlimited power over the destiny of humankind. The Chord is stolen by a self-proclaimed messiah, a madman who intends to use the Lost Chord to control human beings and fuel his plans for world domination. In order to stop him, Shade must undergo a daunting initiation into the mysteries of spirit and sound and discover the only force that can save himself and his fellow human beings.