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In music, a note is either a unit of fixed pitch that has been given a name, or the graphic representation of that pitch in a notation system, and sometimes its duration, or a specific instance of either, so one can speak of "the second note of Happy Birthday" for example. The general and specific meanings are freely mixed by musicians, although they can be initially confusing: "the first two notes of Happy Birthday are the same note", meaning, "the first two sounds of Happy Birthday have the same pitch." A note is a discretization (see musical analysis#discretization) of musical or sound phenomena and thus facilitates musical analysis (Nattiez 1990, p.81n9).
In English, the notes are given 7 letter names: A, B, C, D, E, F, and G. Each letter name is assigned to a specific pitch regardless of the octave in which the pitch resides. Notes are used together as a scales or tone row. However, because there are actually 12 notes needed by diatonic music, the 7 letter names can also be given a modifier.
The two main modifiers are sharps and flats which respectively raise or lower the pitch of a note by a semitone. These are used to create the additional five notes necessary to complete the chromatic scale. The sharp symbol is ♯ (similar to the pound symbol, #), the flat symbol is ♭ (similar to a lower-case b).
In music notation, a note is sharpened or flattened (raised or lowered) by placing a sharp symbol or flat symbol directly in front of the note. When using letters, the symbol follows the letter, as in A♯ for the note A sharp.
Modifiers can be set for the duration of a piece at the front of the staff immediately after the clefA clef ( French for key is a symbol used in musical notation that assigns notes to lines and spaces on the musical staff. A clef can be thought of as assigning a certain note to a specific line on the staff; adjacent spaces are assigned the notes that fol and before the time signatureThe time signature (also known as " meter signature") is a notational device used in Western musical notation to specify how many beats are in each bar and which note value ( quaver, crotchet, quarter note and so on) constitutes one beat. Most time signat, in which case they form the key signatureIn musical notation, a key signature is a series of sharp symbols or flat symbols placed on the staff, designating notes that are to be played sharp or flat unless otherwise noted with an accidental. Key signatures are generally written immediately after: for example, a sharp symbol on the F line indicates that every F in the staff is to be understood as an F♯ (F sharp). Modifiers which occur during the piece and alter a specific note are called accidentalIn musical notation, an accidental is the use of a symbol such as a sharp or flat in the course of a piece, as opposed to in its key signature. This indicates that the note on the staff is altered from the pitch it normally represents. This reverts at thes. An accidental stays in effect until either the end of the measure, or a natural is encountered.
Also common are double flats and double sharps, which alter the pitch of the note by a whole step, rather than a half step. There is also a natural accidental in notation, which undoes the change made by a previous accidental or the key signatureIn musical notation, a key signature is a series of sharp symbols or flat symbols placed on the staff, designating notes that are to be played sharp or flat unless otherwise noted with an accidental. Key signatures are generally written immediately after itself.
When notes are written out in a score, each note is assigned a specific vertical position on either a line or in a space on the staff. Each line or space is assigned a note name, these names are memorized by the musicianA musician is a person who plays or composes music. Musicians can be classified by how they make music: A singer (also called a vocalist) uses his or her voice. An instrumentalist plays a musical instrument. Composers and songwriters make up music and wri and allows him or her to know at a glance the proper pitch to play on his or her instrument for each note-head marked on the page.
The staffIn musical notation, the staff or stave is a set of five horizontal lines on which note symbols are placed to indicate pitch and time. The staff is read left to right: one note to the right of another means that it is to be played later. The vertical posi above above shows the notes C, D, E, F, G, A, B, C and then in reverse order. There are no sharps or flats at the beginning of the staff, indicating that this is the key of C major. (A key signature with no sharps or flats could also denote the key of A minor, which is the relative minor of C major.)
The approximate frequencies of the notes above are:
The frequency of a note doubles per octave—one A is 440Hz and the A an octave higher is 880Hz.
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