How to Play Modal Interchanges on the Guitar
Here is a look at some common modal interchanges on the guitar. These include mixing up major modes, mixing minor modes, and even going back and fourth between major and minor.
How to mix major with Mixolydian
One of the most common and simplest modal interchanges mixes the plain major scale (Ionian mode) with the Mixolydian mode. Here, you take I-IV-V from A major and add the fVII chord from Mixolydian. This gives you a total of four major chords: A, D, E, and G.
There is an example of mixing major and Mixolydian at Modal Interchange.
Here, the G chord is borrowed from the A Mixolydian mode, with the parent scale of D major. Remember that when you borrow a chord, you also borrow its parent major scale. With a progression like A-G-D-E, lead guitarists need to change their scale patterns on the G chord from A major to D major in order for the notes to pair up properly with the chord.
Here are some more popular songs that use this type of modal interchange, this time in various keys. Each key centers on a major chord and mixes the major scale and the parallel Mixolydian mode (for example, B major scale and B Mixolydian mode, G major scale and G Mixolydian scale, and so on). The focus here is on the use of I-IV-V along with fVII.
|B||B-E-Fs-A||I-IV-V-fVII||Crimson and Clover by Tommy James and the
California Girls by The Beach Boys
|G||G-C-D-F||I-IV-V-fVII||Sweet Home Alabama by Lynyrd Skynyrd
Don’t Do Me Like That by Tom Petty
Free Bird by Lynyrd Skynyrd
Little Wing by Jimi Hendrix
|E||E-A-B-D||I-IV-V-fVII||R.O.C.K. in the U.S.A. by John Mellencamp
Sympathy for the Devil by The Rolling Stones
With a Little Help from my Friends by The Beatles
|D||D-G-A-C||I-IV-V-fVII||Comfortably Numb by Pink Floyd
Bouncing Around the Room by Phish
If you’re a lead guitarist, you need to remember to change scales with each mode. Specifically, play Mixolydian mode over the fVII chord. For instance, in the key of G examples, play G major scale patterns over chords G, C, and D, but play C major scale patterns over chord F. G Mixolydian is the 5th mode of C and where the F chord comes from.
How to mix major with Lydian
Another type of modal interchange mixes the major scale with Lydian. The key of A Lydian includes a B major chord which can be added to A major’s A, D, and E. In this case, the B chord is II, a major two chord, so the chord numbers look like this: I-II-IV-V.
Both of the songs American Girl by Tom Petty and Eight Days a Week by The Beatles mix D major and D Lydian in a similar manner. Lead guitars need to be sure to switch scale patterns over the II chord, E. In the key of D, switching to Lydian means playing A major scale patterns because D Lydian is the second mode of A.
How to mix major with minor
To try out another type of modal interchange, mix the major scale with the minor scale, or Aeolian mode. In the key of A, the A minor scale has three major chords to use — C, F, and G. By number, they are fIII, fVI, and fVII.
One common combination uses the fVI and fVII chords and puts three major chords — F, G, and A — right in a row and a whole step apart. Here, the A-D part is I-IV from A major, and the F-G part is fVI-fVII from A minor.
The Beatles use a similar chord progression in their song Lady Madonna. Under the Bridge by Red Hot Chili Peppers has a bridge section that interchanges A major and A minor with the chords A-C-G-F (you can also think of them as A-Am-G-F) around the 2:52 mark and Fmaj7-E7-G near 3:08.
In all these major/minor interchanges, your leads need to switch to minor scale patterns over the chords from the relative minor. Switching from A major to A minor scale patterns means using C major patterns, because A minor is the sixth mode of C.