Information about the augmented undecime interval

Name

This interval is called: Augmented undecime

Abbreviation

You can use the somewhat shorter name "A11" to indicate a Augmented undecime.

Chord name

Sharp eleventh

Construct

How to build a augmented undecime interval?

To construct an interval correctly you must always use two steps.

  1. Count the amount of naturals used
  2. Count the steps between de two notes

At first, and with easy intervals, this may seem unnecessary, but when advancing to more dificult intervals and musical keys they will become more mandatory.

The following example is for a augmented undecime from C3. Outcome: F#4

1.
A Augmented undecime uses 11 naturals.
Example: C3 D3 E3 F3 G3 A3 B3 C4 D4 E4 F4
2.
A Augmented undecime has 18 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 F#4

Cheatsheet

Tranposed for each note

You can use the following cheatsheet to check the Augmented undecime for each root note.
Cb3 ↠ F4
C3 ↠ F4
C3 ↠ F#4
C3 ↠ F4
C#3 ↠ F##4
C3 ↠ F4
Db3 ↠ G4
D3 ↠ G4
D3 ↠ G#4
D3 ↠ G4
D#3 ↠ G##4
D3 ↠ G4
Eb3 ↠ A4
E3 ↠ A4
E3 ↠ A#4
E3 ↠ A4
E#3 ↠ A##4
E3 ↠ A4
Fb3 ↠ Bb4
F3 ↠ B4
F3 ↠ B4
F3 ↠ B4
F#3 ↠ B#4
F3 ↠ B4
Gb3 ↠ C5
G3 ↠ C5
G3 ↠ C#5
G3 ↠ C5
G#3 ↠ C##5
G3 ↠ C5
Ab3 ↠ D5
A3 ↠ D5
A3 ↠ D#5
A3 ↠ D5
A#3 ↠ D##5
A3 ↠ D5
Bb3 ↠ E5
B3 ↠ E5
B3 ↠ E#5
B3 ↠ E5
B#3 ↠ E##5
B3 ↠ E5