It’s been said that you can’t be a great lead player, without first being a great rhythm player. And if you are writing your own material, part of being a great rhythm player involves having great riffs. One of the first things every guitar player learns is how to play power chords. And once you learn a power chord shape, what’s really exciting, is that you can now play every punk song ever written.
Ok that’s not really exciting at all.
But what is exciting, is rather than taking power chords, to take power chords and triads from a scale, and to make some aggressive sounding riffs.
Let’s look at a little bit of theory
The Harmonic Minor Scale
The harmonic minor scale has the following intervals:
1 – 2 – b3 – 4 – 5 – b6 – 7
Which creates the following the triads:
Minor – Diminished – Augmented – Minor – Major – Major – Diminished
Which we could also write as:
i – iio – bIII+ – iv – V – bVI – VIIo
So in the key of E harmonic minor, we would get:
Em – F#dim – G+ – Am – B – C – D#dim
… if you don’t understand any of that, don’t worry. The practical part is coming up. If you are familiar with what I just outlined, but can’t quite do all the music maths in your head, take 10 minutes with a pencil and paper, write out E harmonic minor, then build all the triads one at a time to verify what they are. Anyway, let’s play some guitar.
Mapping Out Harmonic Minor Triads and Power Chords
If we map those out as power chords from the 6th string, and triads from the 5th string, we get (root notes for each pair of chords is in red):
Ok that’s cool, so what do we do with that?
First, treat it like a scale exercise. Play each shape one at a time. Say the chord name out loud as you go. Get your fingers used to the patterns.
Next, take two or three shapes, and start making up rhythms to put over the top of them. You could tap a rhythm on the side of the table
anduse that. Take shapes at random. Put some palm muting in. Maybe take two shapes and pick a weird time signature?
Play around with it.
The main riff from Passing Light uses this exact idea. It’s a few power chords and triads from G harmonic minor being played in 15/8.
Bonus: Once you have your riff, have a go at improvising over the top using the arpeggio and integration idea.
Bonus bonus: Take this idea for making riffs and apply it to the article on chords in minor keys.