An augmented fifth is a musical interval that spans five scale degrees and consists of eight semitones. The prefix "augmented" identifies it as being one semitone larger than the perfect fifth. Its inversion is the diminished fourth, and its enharmonic equivalent is the minor sixth.
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- An augmented fifth is a musical interval that spans five scale degrees and consists of eight semitones. The prefix "augmented" identifies it as being one semitone larger than the perfect fifth. Its inversion is the diminished fourth, and its enharmonic equivalent is the minor sixth. The augmented fifth has no diatonic occurrence, and only began to make an appearance, at the beginning of the common practice period of music, as a consequence of composers seeking to strengthen the normally weak seventh degree when composing music in minor modes. This was achieved by chromatically raising the seventh degree to match that of the unstable seventh degree of the major mode (an increasingly widespread practice that led to the creation of a modified version of the minor scale known as the harmonic minor scale). A consequence of this was that the interval between the minor mode's already lowered third degree and the newly raised seventh degree (leading note), previously a perfect fifth, had now been "augmented" by a semitone. Another result of this practice was the appearance of the first augmented triads, built on the same (mediant) degree, in place of the naturally occurring major chord. As music became increasingly chromatic, the augmented fifth was used with correspondingly greater freedom and also became a common component of jazz chords. Near the end of the nineteenth century the augmented fifth became commonly used in a dominant chord. This would create an augmented dominant (or V) chord. The augmented fifth of the chord would then act as a leading tone to the third of the next chord. This augmented V chord would never precede a minor tonic (or i) chord since the augmented fifth of the dominant chord is identical to the third of the tonic chord. In an equal tempered tuning, an augmented fifth is equal to eight semitones, a ratio of 2:1, or 800 cents. The augmented fifth is a context-dependent dissonance. That is, when heard in certain contexts, such as that described above, the interval will sound dissonant. In other contexts, however, the same eight-semitone interval will simply be heard (and notated) as its consonant enharmonic equivalent, the minor sixth.
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- Augmented fifth on C.mid
- Minor sixth on C.mid
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- An augmented fifth in just temperament
- An augmented fifth in equal temperament
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- Augmented Fifth ET.ogg
- Augmented Fifth JT.ogg
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- An augmented fifth in just temperament
- An augmented fifth in equal temperament
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- An augmented fifth is a musical interval that spans five scale degrees and consists of eight semitones. The prefix "augmented" identifies it as being one semitone larger than the perfect fifth. Its inversion is the diminished fourth, and its enharmonic equivalent is the minor sixth.
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