(Play Today Instructional Series). The ULTIMATE self-teaching method designed to offer quality instruction, terrific songs, and professional-quality audio with 57 full-demo tracks. This harmonica method can be used by students who want to teach themselves, or by teachers for private or group instruction. Simply follow the tips and lessons in the book as you listen to the teacher on the tracks. For use with a standard, 10-hole diatonic harmonica in the key of C major. The price of this book includes a unique code that provides access to audio tracks online, for download or streaming. The tracks include PLAYBACK+, a multi-functional audio player that allows you to slow down audio without changing pitch, set loop points, change keys, and pan left or right available exclusively from Hal Leonard.