I go through cycles of high energy/lethargy. They vary in length, with a full cycle lasting anywhere between a week and over a month. At the moment I'm in a lethargic phase, but I seem to be picking up.
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Music Theory 101: Cadences.
Authentic cadence: V-I
Plagal cadence: IV-I
Deceptive cadence: V- ANYTHING BUT I ! !! !
Beethoven cadence: V-I-V-I-V-V-V-I-I-I-I-I-I-I-I-I-I-I
-I-I-I-I-I-I-I-I! I! I! I I I