So, as you can see it’s a great scale with which to outline chords and provide the correct melodic and harmonic ... explore the harmonic minor scale across the entire guitar neck using the ...

which result in some interesting chordal and melodic possibilities. The Hungarian Gypsy scale is the fourth mode of the double harmonic scale, and is a great choice over minor/major 7th chords.

Harmonic minor keys are used when writing chords. There is another version of the minor key known as the melodic minor. This is used when writing a melody. Each key signature has two possible keys.