Book excerpt: At last, a complete method on how to play the tremolo and octave harmonicas. Another Phil Duncan step by step method designed to help you learn to play these special double reed harmonicas. Irish, folk, gospel, bluegrass, and country are a few of the musical styles covered. Single tone and tongue block methods are used. Thirty-seven progressive examples and tunes will have you playing with understanding and correct technique. A perfect way to expand your harmonica sounds. the recording is split track. Each example and tune is played throughout the book. the octave and tremolo harmonicas are used.