Music Theory Notes
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Any cadence ending on the Five chord is considered a half cadence.
So in the key of C,
C D E F G
1 2 3 4 5
G triad is the five.
Authentic cadence is a 5-1.
So in a key of C
Authentic Cadence: G-C
Plagal Cadenceis a 4-1
So in a key of C
Plagal Cadence: F - C
Deceptive cadence is 5- any number that is not 1.
so the deceptive cadence in the key of C is
5-4-3-2
