Hi guys!
It was requested in another thread to explain the theoretical side of the modes. So here we go (sorry if I’m probably not always using the right terms, I’m no native speaker):
Our starting point is the C-major scale (C – D – E – F – G – A – B – C). Let’s have a look at the intervals between the notes. In halftones the structure is
2 (C to D) – 2 (D to E) – 1 (E to F) – 2 (F to G) – 2 (G to A) – 2 (A to B) – 1 (B to C).
Now see what happens to this structure if we’re starting the C-Major scale from D:
D – E – F – G – A – B – C – D or in intervals: 2 – 1 – 2 – 2 – 2 – 1 – 2
We can now start from every note of the C-major scale and will always get a different structure of the intervals. For a better overview I repeat the two structures above and write down the structure for the following notes together with the name of the modes:
C to C (ionian or simply major): 2 – 2 – 1 – 2 – 2 – 2 – 1
D to D (dorian): 2 – 1 – 2 – 2 – 2 – 1 – 2
E to E (phrygian): 1 – 2 – 2 – 2 – 1 – 2 – 2
F to F: (lydian): 2 – 2 – 2 – 1 – 2 – 2 – 1
G to G (myxolydian): 2 – 2 – 1 – 2 – 2 – 1 – 2
A to A (aeolian or simply natural minor): 2 – 1 – 2 – 2 – 1 – 2 – 2
B to B (locrian): 1 – 2 – 2 – 1 – 2 – 2 – 2
So, what do you do if you’d like to play e.g. E-phrygian? Take a look at the interval structure and apply it to the starting note E:
E – F – G – A – B – C – D – E
I hope you can follow me up to this point.
The (maybe) harder question is: How to memorize this? I have a simple trick, at least I hope so. Let’s take phrygian and the C-major scale as an example again: As you can see above phrygian (E) is a major third above the root note (C). If now someone says “please play E-phrygian”, you should first remember that phrygian is a major third above the root note. The trick is to take this major third but go downwards from the root note and use the target note as your starting note for a major scale. If you go a major third downwards from your root note E, your target note will be C. So E-phrygian will simply be a C-major scale starting from E (as you can see in the example above).
Another example: E-myxolydian. Myxolydian is a fifth above the root note. A fifth downwards from E is A. So simply play the A-major scale starting from E. Applying this trick to all modes:
Ionian = nothing happens, simply play the major scale from your root note
Dorian = the major scale which is a major second downwards from your root note
Phrygian = the major scale which is a major third downwards from your root note
Lydian = the major scale which is a fourth downwards from your root note
Myxolydian = the major scale which is a fifth downwards from your root note
Aeolian= the major scale which is a major sixth downwards from your root note
Locrian = the major scale which is a major seventh downwards from your root note
Hope this helps! In another post I will explain phrygian and lydian dominat as well, but for now I’m running out of time.