Uploaded October 2019 | Updated September 2026, 3 weeks ago

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In this guide to chords, we cover how to build all the triads (major, minor, diminished and augmented), the concept of triadic chord building in general, and we preface roman numeral harmonic analysis.

Music theory prerequisite on intervals: youtube.com/watch?v=dXg8eCHNaTE

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ANSWER KEY:

D major: D F# A
F# minor: F# A C#
A diminished: A C Eb
Bb augmented: Bb D F#