Circle of 5ths	BEADGCF and FCGDAEB	Theory Things  William Wieland
		Major Keys minor keys accidentals major/minor and accidentals Circle of Tolkien Wikipedia major keys backwards What time is it?

Why learn this abstraction?	• Key signatures — relative keys — closely related keys • Scales — major & pentatonic • Triads — major & minor • Chord progressions • String instruments — violin, viola, cello, bass, guitar, mandolin
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