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Wikipedia definition
1. C-sharp majorC♯ major (or C-sharp major) is a major scale based on C♯, consisting of the pitches C♯, D♯, E♯, F♯, G♯, A♯, and B♯. Its key signature has seven sharps. Its relative minor is A♯ minor, and its parallel minor is C♯ minor. Its enharmonic equivalent is D♭ major. A harp tuned to C-sharp major has all its pedals in the bottom position.
Read “C-sharp major” on English Wikipedia
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Read “C-sharp major” on DBpedia

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