Know Before You Blow Blues Group Ensemble Score and CD The three styles of focus in the Blues Edition are Swing, Jazz Rock & Shuffle. Every style is clearly defined on the articulation pages and each scale, lick & jazz head is written in every popular key. This Blues Volume includes 2 CDs and is the nucleus of the entire method. Know Before you Blow Blues provides the basic beginnings for any student of jazz who wants to advance to the next level.