How can I retune my guitar? What are the most common tunings and what do they sound like? Can I invent my own tunings? This book/CD provides detailed answers to all your questions, showing you how to unlock the secrets of altered tunings and discover cool new sounds! Includes: six essential tunings described in detail; hundreds of exciting new chord shapes; 12 specially written pieces to learn in open tunings; a complete list of commonly used altered tunings; and more. The CD features over 50 tracks and more than 170 chords.