Information about the P11 interval

Name

Perfect undecime

Abbreviation

P11

Chordname

Eleventh
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Construct

How to build a Perfect undecime?

1.
A Perfect undecime uses 11 naturals.
Example: C3 D3 E3 F3 G3 A3 B3 C4 D4 E4 F4
2.
A Perfect undecime has 17 semitones between the notes.
Example: C3 C#3 D3 D#3 E3 F3 F#3 G3 G#3 A3 A#3 B3 C4 C#4 D4 D#4 E4 F4

Cheatsheet

Cb3 ↠ Fb4
C3 ↠ F4
C#3 ↠ F#4
Db3 ↠ Gb4
D3 ↠ G4
D#3 ↠ G#4
Eb3 ↠ Ab4
E3 ↠ A4
E#3 ↠ A#4
Fb3 ↠ Bbb4
F3 ↠ Bb4
F#3 ↠ B4
Gb3 ↠ Cb5
G3 ↠ C5
G#3 ↠ C#5
Ab3 ↠ Db5
A3 ↠ D5
A#3 ↠ D#5
Bb3 ↠ Eb5
B3 ↠ E5
B#3 ↠ E#5