Inside Improvisation Series : vol. 7 Hexatonic scales are six note scales. This book presents a practical method for the construction of hexatonic scales that are useful for both the improviser and composer. Many modern piano players use hexatonic voicings by stacking the triads to create a particular harmony. We improvise “in” the sound of the voicing and using hexatonic voicings and lines can lend a very contemporary sound.