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a-sharp major

n. 1 (context music English) the major key with A-sharp as its tonic and the notes A#, B#, C##, D#, E#, F##, G##. Such a high number of accidentals (especially double sharp) is undesirable. Therefore, it is usually scored and referred to as its enharmonic equivalent; B-flat major. 2 (context music English) the major chord with a root of A-sharp