(Berklee Guide). Many famous musicians have learned to develop their own unique jazz style using Berklee Professor Emeritus John LaPorta's techniques. First published in 1968 and now thoroughly updated and revised, his method provides a practical and intuitive approach to teaching basic jazz improvisation through 12 lessons and accompanying audio. Features information on jazz theory, rhythm training, performance ear training, and much more. The audio is accessed online using the unique code inside each book and can be streamed or downloaded. The audio files 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.