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Home > Scales > Harmonic Minor - When

When to Play Harmonic Minor - 5 Approaches

It's one thing knowing how to play the harmonic minor scale (e.g. its patterns), but knowing when to use it is where a lot of guitarists struggle. It can be an awkward one.

In this lesson I'll reveal five situations in which harmonic minor can play an effective role in your solos, in both minor and major keys. The focus here will be on training your ear to identify the chord changes that imply harmonic minor. That way, you'll know exactly when to make the "scale switch", simply by hearing the chord progression.

Start by watching the presentation below and then use the supplemental content on this page to help fully internalize this valuable knowledge...




Harmonic Minor "Switch" Ear Training

Knowing when to change scales is a hell of a lot easier when you know what to listen out for. In terms of soloing and creating a melody over a sequence of chords, that's where ear training can be hugely rewarding.

In fact, it can get to the stage where you hear a song for the very first time and can actually predict which chords (and therefore scales) will come next, based on the implied harmony. As you can imagine, this does wonders for your improvisation skills.

Harmonic minor's dominant function in minor keys

As mentioned in the video, the most common application of harmonic minor in minor keys is over the major V (5) chord.

Use the table below to study this i - V relationship in several common keys. We basically switch from natural minor to harmonic minor over the V chord, using the same root. Use the following patterns as a guide (as you can see, there's only one note difference between the two scales - the 7th)...

Natural minor                                                                   Harmonic minor

natural minor scale box patternharmonic minor scale box pattern

Key Tonic (i) Dominant (V) Audio
Am Am
A Natural Minor
Emaj or E7
A Harmonic Minor
Click here
Cm Cm
C Natural Minor
Gmaj or G7
C Harmonic Minor
Click here
Em Em
E Natural Minor
Bmaj or B7
E Harmonic Minor
Click here
F#m F#m
F# Natural Minor
C#maj or C#7
F# Harmonic Minor
Click here

Tip: Over the V chord, the emphasis is on harmonic minor's major 7th tone (7), because this becomes the major 3rd of the V chord - a strong target note for harmonization. This is the defining note in the switch from natural to harmonic minor.

Note:
If the chord progression only moves back and forth between the i and V chords like this (as some songs do), you can technically use any minor scale (e.g. Dorian, natural/harmonic/melodic minor) over the tonic chord. However, we're specifically looking at the most commonly used minor key centre - natural minor. So if any other chords are used away from that V chord, natural minor will be your safest bet.

Example in A minor

Here, I play natural minor over the opening three chords - i  VII  VI - and then switch to harmonic minor over the V7 chord.

Click the tabs in this lesson to hear examples.

Natural to harmonic minor tab

Dominant function in major keys

Using harmonic minor over the V chord in major keys makes a nice change from the more natural sounding major scale. In fact, this application goes back to the baroque, classical and romantic periods.

You won't always want the tense sound it offers, but keep it in mind for when you want to add some variation to your major key solos.

There are two approaches for this function...

The first is to play harmonic minor on the same root as the major scale. So this is exactly the same approach as the minor key V, just resolving to major intead of minor...

Major/Ionian                                                                     Harmonic minor

major scale box patternharmonic minor scale box pattern

Key Tonic (i) Dominant (V) Audio
C Cmaj
C Major
Gmaj or G7
C Harmonic Minor
Click here
E Emaj
E Major
Bmaj or B7
E Harmonic Minor
Click here
G Gmaj
G Major
Dmaj or D7
G Harmonic Minor
Click here
Bb Bbmaj
Bb Major
Fmaj or F7
Bb Harmonic Minor
Click here

Tip: Just like with the minor key V chord, the emphasis is on harmonic minor's major 7th tone (7), because this becomes the major 3rd of of the V chord.

Example in C major

Playing C major over a I  IV  ii  V progression, with C harmonic minor played over the V chord.

C major lick with C harmonic minor over V chord

The second option is to play harmonic minor in the relative minor position of the major scale over that V chord. All this means is we play our harmonic minor scale 3 frets down from our major scale root when the progression changes to V...

Diagram showing harmonic minor with relative major root

Example in C major

Exactly the same C major progression as before, but this time playing A harmonic minor over the V chord (as A minor is the relative minor of C major). A rather strange but nevertheless interesting sound...

tab showing A harmonic minor used over E major

Mediant function in major keys

Harmonic minor can work nicely over the major III (mediant) chord in major key progressions.

You could use the same "relative root" method as before if you like - for example if the progression moved from Cmaj to E7 (I to III) you might play C major over Cmaj and then A harmonic minor (A being relative to C) over E7.

However, as covered in the video, if you want to keep the same root as the major scale, use harmonic minor's 3rd mode - major/Ionian #5.

This might seem confusing to you, but all you really need to know is that using this major #5 scale over the III chord will ensure you don't hit a bum note (since the major III technically moves us outside the major scale).

Note that this won't work over a natural iii (minor) chord in major keys. You need to train your ear to hear this major/minor mediant distinction. That's what the audio below is for!

Major/Ionian                                                                     Major #5

major scale box patternMajor #5 scale

Key Tonic (i) Mediant (III) Submediant (vi) Subdominant (IV) Audio
C Cmaj
C Major
Emaj or E7
C Major #5
Am
C Major
Fmaj
C Major
Click here
E Emaj
E Major
G#maj or G#7
E Major #5
C#m
E Major
Amaj
E Major
Click here
G Gmaj
G Major
Bmaj or B7
G Major #5
Em
G Major
Cmaj
G Major
Click here
Bb Bbmaj
Bb Major
Dmaj or D7
Bb Major #5
Gm
Bb Major
Ebmaj
Bb Major
Click here

Tip: try targeting (or emphasising) the #5 of major #5 over the III chord, as this corresponds to the chord's major 3rd - a strong note for harmonization.

Example in C major

Towards the end of the example I use a major pentatonic pattern (instead of straight C major) which would, as it happens, overlap with the relative harmonic minor pattern. Always be looking for these convenient positions when switching scales.

tab showing Ionian #5 being played over E7 chord

Pure harmonic minor

Of course, you can also use harmonic minor to colour minor chords on their own. However, most commonly it works best over the tonic (i) chord in minor key progressions, as a spicier alternative to natural minor. Use the i - V tracks from earlier to experiment with this.

Using the major 7th of the scale over a minor chord will give it a very tense sound, and sometimes this is desirable. Just be aware of the colour it adds to your minor chords and use it appropriately, based on the sound you want.

Example in A minor

A harmonic minor tab

Hopefully, after going through this lesson, you'll see (well, hear!) just how valuable ear training is. If you want to take this to the next level, I highly recommend the free 10 day course from Easy Ear Training. These guys will show you how simple ear training exercises can make you a better musician, which translates into better guitar playing!

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