In order to study jazz you need to have a good grasp of how to use the diminished scale. Here are 18 diminished jazz licks that I've accumulated through the years. They are based on the dominant diminished scales and are to be played over altered dominant chords. Lick lesson #1 is eleven minutes long and includes explanations, lessons 2-18 are approximately 2-3 minutes long. All licks are demonstrated up close and rehearsed by measure with PDF in tab and notation.