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Double flats or sharps lower or raise or the pitch of a note by two semitones. [3] An F double sharp is a whole step above an F, making it enharmonically equivalent to a G. These alterations apply to the note as if it were a "natural", regardless of the key signature (see the F in measure 2 of the Chopin example below).
The key is also appropriate for guitar music, with drop D tuning making two D's available as open strings. For some beginning wind instrument students, however, D major is not a very suitable key, since it transposes to E major on B ♭ wind instruments, and beginning methods generally tend to avoid keys with more than three sharps.
Sharp The sharp symbol raises the pitch of a note by one semitone. Natural A natural cancels a sharp or flat. This sharp or flat may have been indicated as an accidental or defined by the key signature. Double flat A double flat lowers the pitch of a note by two semitones. Double sharp A double sharp raises the pitch of a note by two semitones.
However, in common guitar tabs notation, a minor key is designated with a lowercase "m". For example, A-minor is "Am" and D-sharp minor is "D ♯ m"). The small interval between equivalent notes, such as F-sharp and G-flat, is the Pythagorean comma .
The key signatures associated with those pitches change accordingly: the key of G has one sharp, the key of D has 2 sharps, and so on. Proceeding counterclockwise from the top of the circle, the notes change by descending fifths and the key signatures change accordingly: the key of F has one flat, the key of B ♭ has 2 flats
B minor is a minor scale based on B, ... Its key signature has two sharps. Its relative major is D major and its parallel major is B major. The B natural minor scale is:
Use of key signature usual or unusual 15 equal temperament: 15-tet scale on C. Play ... Whole tone scale on C. Play ⓘ 1 2 3 ...
A key signature with one sharp must show F-sharp, [3] which indicates G major or E minor. There can be exceptions to this, especially in 20th-century music, if a piece uses an unorthodox or synthetic scale and an invented key signature to reflect that.