I’m somewhat confused by what is intended when it says “Repeat exercise using lower chromatic NT of 3 instead of “2”. I see this instruction or something similar with several of the Bebop calisthenics. Appreciate any clarification provided.
For example, in C a diatonic lower NT of the 3rd or E would be D. A chromatic lower NT of the 3rd would be D#.
Lower Chromatic NTs are explained on p.24 and 25 of the Lesson book. Furthermore, in Video #3 of Module 2 after explaining Neighboring Tones, I give various examples playing diatonic and chromatic NTs.
Hopefully this should clarify your question.