Music Theory Cheat Sheet

Last Updated: November 21, 2025

Major Scale

Pattern
W-W-H-W-W-W-H (W=whole step, H=half step)
C Major
C-D-E-F-G-A-B-C

Common Chords

Chord Type Formula Example (C)
Major 1-3-5 C-E-G
Minor 1-♭3-5 C-E♭-G
Dominant 7th 1-3-5-♭7 C-E-G-B♭
Major 7th 1-3-5-7 C-E-G-B

Time Signatures

Signature Meaning
4/4 4 beats per measure, quarter note gets 1 beat
3/4 3 beats per measure (waltz time)
6/8 6 beats per measure, eighth note gets 1 beat
💡 Pro Tip: Learn the Circle of Fifths to understand key relationships!
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