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Lesson Understanding Intervals

Diminished & Augmented 5th

♭5 and ♯5 — the color tones

Prove it — just do the practice exercise.
C → Gb 6 semitones
C
root
Gb
♭5
Diminished 5th (♭5) = 6 semitones
→ Same as the tritone! Found in m7♭5 (half-diminished).

Augmented 5th (♯5) = 8 semitones
→ Floating sound. Found in augmented triads.

Example:
C → Gb = diminished 5th
C → G# = augmented 5th

These intervals create color and tension.