Editing Augmented second (section)

{{Infobox Interval|
main_interval_name = Augmented second|
inverse = [[diminished seventh]]|
complement = [[diminished seventh]]|
other_names = -|
abbreviation = A2<ref name="B&S"/>|
semitones = 3|
interval_class = 3|
just_interval = 75:64,<ref name="Haluska">Haluska, Jan (2003). ''The Mathematical Theory of Tone Systems'', p.xxvi. {{ISBN|0-8247-4714-3}}. Classic augmented second.</ref> 125:108, 7:6, 19683:16384| 
cents_equal_temperament = 300|
cents_24T_equal_temperament = |
cents_just_intonation = 275, 253, 267, 318
}}
[[File:Augmented second on C.png|thumb|right|Augmented second on C {{audio|Minor third on C.mid|Play}}.]]

In [[Western classical music]], an '''augmented second''' is an [[Interval (music)|interval]] created by [[augmentation (music)|widening]] a [[major second]] by a [[chromatic semitone]], spanning three [[semitones]] and enharmonically equivalent to a [[minor third]] in [[12-tone equal temperament]].<ref name="B&S">Benward & Saker (2003). ''Music: In Theory and Practice, Vol. I'', p.54. {{ISBN|978-0-07-294262-0}}. Specific example of an A2 not given but general example of major intervals described.</ref><ref>Hoffmann, F.A. (1881). ''Music: Its Theory & Practice'', p.89-90. Thurgate & Sons. Digitized Aug 16, 2007. Archaically: '''redundant''' or '''extreme sharp second'''.</ref> For instance, the interval from C to D is a major second, two semitones wide, and the interval from C to D{{Music|sharp}} is an augmented second, spanning three semitones.