Twelve Tunes (Twelve Tunes is a jazz play-along for advanced musicians who just happen to be beginning improvisers. The way Eddie Lewis teaches jazz, the firs step is to start improvising immediately. Yes, he teaches all the same theory and skills that other teachers teach, but in Eddie’s lessons, those things are not prerequisites. Twelve Tunes is a way for skilled musicians to jump into the proverbial improvisation pool and get started now. Each tune is composed in a way that allows the improviser to explore the key instead of the chords. It is a horizontal approach as opposed to a vertical one. Horizontal improvisation is easier. That’s why he uses it as the first step.