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Information about the augmented tredecime interval

Name

This is the augmented tredecime interval.

Abbreviation

This interval is abbreviated with A13.

Practice the A13 interval

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Construct

How to construct the augmented tredecime interval?

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

1 • Count the amount of naturals used
2 • Count the semitone steps between the two notes

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

The following example is for a minor second from C3. Outcome: A4

1 • The augmented tredecime spans 13 naturals.
C3  ↠  D3  ↠  E3  ↠  F3  ↠  G3  ↠  A3  ↠  B3  ↠  C4  ↠  D4  ↠  E4  ↠  F4  ↠  G4  ↠  A4
2 • The augmented tredecime has 22 semitones between the notes.
C3  ↠  C3  ↠  D3  ↠  D3  ↠  E3  ↠  F3  ↠  F3  ↠  G3  ↠  G3  ↠  A3  ↠  A3  ↠  B3  ↠  C4  ↠  C4  ↠  D4  ↠  D4  ↠  E4  ↠  F4  ↠  F4  ↠  G4  ↠  G4  ↠  A4  ↠  A4

Cheatsheet

The augmented tredecime transposed from each note

C
A
C
A
C
A
D
B
D
B
D
B
E
C
E
C
E
C#
F
D
F
D
F
D
G
E
G
E
G
E
A
F
A
F
A
F#
B
G
B
G
B
G#

Practice the A13 interval

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Chords

Which chords use the augmented tredecime interval?

Scales

Which scales use the augmented tredecime interval?

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