Definitions for key signature

This page provides all possible meanings and translations of the word key signature

Random House Webster's College Dictionary

key′ sig`nature(n.)

  1. (in musical notation) the group of sharps or flats placed after the clef to indicate the tonality of the music following.

    Category: Music and Dance

Princeton's WordNet

  1. key signature, signature(noun)

    the sharps or flats that follow the clef and indicate the key

Wiktionary

  1. key signature(Noun)

    An indication of the key of a composition, giving the number of sharps or flats in the corresponding scale.

Freebase

  1. Key signature

    In musical notation, a key signature is a set of sharp or flat symbols placed together on the staff. Key signatures are generally written immediately after the clef at the beginning of a line of musical notation, although they can appear in other parts of a score, notably after a double barline. A key signature designates notes that are to be played higher or lower than the corresponding natural notes and applies through to the end of the piece or up to the next key signature. A sharp symbol on a line or space in the key signature raises the notes on that line or space one semitone above the natural, and a flat lowers such notes one semitone. Further, a symbol in the key signature affects all the notes of one letter: for instance, a sharp on the top line of the treble staff applies to F's not only on that line, but also to F's in the bottom space of the staff, and to any other F's. An accidental is an exception to the key signature, applying only in the measure in which it appears, and the choice of key signature can increase or decrease the need for accidentals. Although a key signature may be written using any combination of sharp and flat symbols, about a dozen diatonic key signatures are by far the most common, and their use is assumed in much of this article. A piece scored using a single diatonic key signature and no accidentals contains notes of at most seven of the twelve pitch classes, which seven being determined by the particular key signature.

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