Mode Lesson 2: Harmonic Minor.
There seems to be some discussion as to whether this is really a Mode or a Scale. I really don't care, honestly. Either way, it's simply a manipulation of the 12 notes to achieve a tonality. Much like Lydian and Mixolydian and Dorian, Harmonic Minor can most easily be summed up as a variation on the Major or
Minor scales. Harmonic Minor is created either by flatting the 3 and 6 of the major scale or sharping the 7 of the same minor scale. Let's use A.
A Major: A, B, C#, D, E, F#, G#, A
flat the 3 and 6
A Harmonic Minor: A, B, C, D, E, F, G#, A
A Minor: A, B, C, D, E, F, G, A,
Sharp the 7
A Harmonic Minor: A, B, C, D, E, F, G#, A
So either way it works. Why does this scale sound so medieval? There are 3 half steps between the 6 and 7. This space of three spaces between two adjacent notes in a scale is called a Augmented Second and it creates the disjointed feeling so common in classical compositions. Because this is such a disjointed sounding scale, theorists often argue it's not such a fun scale to try and create melodies over, but rather that you should choose chords from Natural Minor and solo over them in Harmonic Minor. This is primarily what folks like Yngwie do. Because of the Augmented Second between the 6 & 7, you may find fluidity a struggle. This is where your pinky comes in folks. In my experience, the average player has little control and strength in his pinky finger. This is most important. Let's use A Harmonic Minor and I'll give you a few examples to practice with.
Code:
e------------------
B------------------
G------------------
D------------------
A---------7-8-11-12
E-4-5-7-8----------
run these sort of riffs up and down the neck, make sure you always alternate pick and you won't have to relearn later.
also try this sort of lick called a spider
Code:
e--------
B--------
G--------
D--------
A--------
E-4-7-5-8
Now don't cheat and use just your index and ring finger, keep your hand still and use index, ring, middle, pinky combos

This kind of stretching and practice is the only way to be fluid. Also don't forget, if you're not completely familiar with where every note is, or at least well on your way, you're holding yourself back.
CLASS DISMISSED!! PRACTICE PRACTICE PRACTICE
