Diatonic Quadad Analysis

It's time to analyze Quadad Chords just like we did with Triads.

View the full lesson at Diatonic Quadad Analysis | JustinGuitar

Can we please have the answers to the exercise portion of this lesson where we are to write out the notes in the E Major Diatonic Quadads? I’m having trouble analyzing the notes in each chord to work out what chord type is on each scale degree. Specifically, dealing with the root notes as a sharp. Thanks!

I think I just cracked the code

does it almost follow the Diatonic Chord Progression of Major-Minor-Minor-Major-Major-Minor-Diminished? but instead of that, it’d be Maj7-Min7-Min7-Maj7-7-Min7-Min7b5?

EDIT: I just got to the Diatonic Quadad Chord Progression and man do I feel smart

1 Like

Here is a clue …

Justin’s template


You are comparing the chord notes with the major scale of each chords root note.

E major scale = E, F#, G#, A, B, C#, D#

Quadad = E (1), G# (3), B (5), D# (7) = 1, 3, 5, 7 = maj7

F# major scale = F#, G#, A#, B, C#, D#, E#

Quadad = F# (1), A (b3), C# (5), E (b7) = 1, b3, 5, b7 = min7

From earluer lessons you should be able to complete the major scales for all root notes of the quadads and decide if the notes within the quadads match exactly or are modified (by flattening).

G# major scale =
A major scale =
B major scale =
C# major scale =
D# major scale =

I hope that helps.

Yes indeed.
Smarty pants you are!
Have a gold star.