Check the listing for details. Hal Leonard Jazz Play-Along The Blues (B-Flat, E-Flat, C-Instruments) Book/CD. Condition: Brand New. Listed at 15.99 USD. Welcome to the exciting world of jaz improvisation! Wheather you are using this book as a supplement to the Essential Elements for Jazz Ensemble method book or just by itself, this play along book will help you get started creating your own improvised solos. The recordings feature professional jazz players performing well known classics and provided an excellent model for playing in a jazz style. In addition, sample solos are provided as a guide for creating effective melodies. An added feature on the CD-ROM is a software program for changing the tempo of any of the recorded tracks! When used in your computer, The Amazing Slow Downer will allow you to adjust the tempo to suit your needs as you progress through the book.