Lesson Understanding Intervals
11th & 13th
The upper extensions
Prove it — just do the practice exercise.
C → F 17 semitones
- C
- root
- F
- 11th
11th = octave + 4th = 17 semitones
→ In m11: modal, Dorian character
→ ♯11: Lydian sound (Maj7#11)
13th = octave + 6th = 21 semitones
→ In 13: full big band sound
→ Color without need to resolve
These intervals are only used in extended chords. They add "flavor" — not the basic function.
→ In m11: modal, Dorian character
→ ♯11: Lydian sound (Maj7#11)
13th = octave + 6th = 21 semitones
→ In 13: full big band sound
→ Color without need to resolve
These intervals are only used in extended chords. They add "flavor" — not the basic function.