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| | Key signature |
 | | Subsequent additional sharps are added on C, G, D, A, E and B. For key signatures with flats, the first flat is placed on the B line, with subsequent flats on E, A, D, G, C and F. There are 15 different key signatures, including the "empty" signature of C major/A minor. |
 | | Baroque music written in minor keys often was written with a key signature with fewer flats than we now associate with their keys; for example, movements in C minor often had only two flats. |
 | | For example, if a one-sharp key signature is placed at the beginning of a piece, every F in the piece in any octave will be played as F sharp, unless there is an accidental. |
| www.tocatch.info /en/Key_signature.htm (855 words) |
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