Triad Chord Analysis

Let's use our knowledge to learn how we can sort out the names of any chord we encounter!

View the full lesson at Triad Chord Analysis | JustinGuitar

Just in case you guys missed this very useful tip (I don’t think it was in the video, but written below the Triad Chord Theory Video.) Copied from the page below:

“My student ReyGuitar (username) suggested a fun way to remember them! The note B is on its own with a # on both 3 and 5. The chords of the DEA (think Drug Enforcement Agency) have a # on the 3rd, and the rest are all naturals! Good one, Rey! :)”

That tip, combined with Fat Cat Gets Drunk At Every Bar mnemonic FCGDAEB, you can figure out which notes on the flat or sharp keys aren’t natural without needing the whole chart of Keys.

Hey great lesson as always! But I have a BURNING question. You see, I don’t know the major scale notes of sharp scales like A# or D#. I triple-checked the Mr. Cato’s formula and the comments there but I didn’t come across any answers that made sense. I’m 100% sure that FCGDAEB “trick” (although absolutely amazing!) doesn’t cover sharp major scales besides the exceptions of F# and C#. (Justin talks about these in the lesson)

But again, what about other sharp major scales? Like E# major, G# major or D# major for example? Is there a formula or any way to know what the notes of those scales are?

If somebody could help me out with this I’d REALLY appreciate it! As I’m almost 100% confident with all the theory I learned in this amazing course so far. But I couldn’t get my head wrapped around this one.

Thanks a lot!

Hi my suggestion would be to go with flats rather than sharps, it’s way easier as you can use Mr Kato’s trick and you know how many flats each scale have thanks to the trick. After all they are equivalent tonal wise with sharps :slight_smile:

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Thanks man, I didn’t think that they were enharmonic equivalents you’re right!

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It is always the simplest answers are the least obvious ones! :grinning_face_with_smiling_eyes:

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True dat haha

I’m confused about A diminished. The formula is 1 b3 b5 then why are the notes A C Eb? Shouldn’t C be flat as well?

The formula for A major is 1 3 5, or A C# E. So, A dim 1 b3 b5 is A C Eb.


Thanks, I was thinking it was C