Watch the Harmonic Minor online guitar lesson by John Stowell from Modern Jazz Improv

As I mentioned in an earlier video, the harmonic minor a major third above can be interpreted both as a Lydian#9 and a diminished maj7th (i.e., E harmonic minor is both Cmaj#9#11 and a C diminished maj7). Both of these harmonic minors (relative and major 3rd above) generate some tension, but can be used with discretion over a C maj7 with no alterations. When playing an E harmonic minor over C maj7th, don't linger too long over the Eb note for obvious reasons.