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  2. List of musical symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_symbols

    Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...

  3. Law of sines - Wikipedia

    en.wikipedia.org/wiki/Law_of_sines

    In trigonometry, the law of sines, sine law, sine formula, or sine rule is an equation relating the lengths of the sides of any triangle to the sines of its angles. According to the law, ⁡ = ⁡ = ⁡ =, where a, b, and c are the lengths of the sides of a triangle, and α, β, and γ are the opposite angles (see figure 2), while R is the radius of the triangle's circumcircle.

  4. Glossary of music terminology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_music_terminology

    The practice of using solo voices on each musical line or part in choral music. ordinario (ord.) (Ital.) or position ordinaire (Fr.) In bowed string music, an indication to discontinue extended techniques such as sul ponticello, sul tasto or col legno, and return to normal playing. The same as "naturale". organ trio

  5. Sector (instrument) - Wikipedia

    en.wikipedia.org/wiki/Sector_(instrument)

    A typical English sector, probably from the early 19th century, made of ivory with a brass hinge. This side has scales for lines of lines (L), secants (S), chords (C), and polygons (POL), along with a scale of 10ths of inches on the outer edges forming a straight 12-inch rule when the sector is fully opened, and a scale of 100ths of a foot marked along the side (only barely visible in this ...

  6. Stem (music) - Wikipedia

    en.wikipedia.org/wiki/Stem_(music)

    There is an exception to this rule: if a chord contains a second, the stem runs between the two notes with the higher being placed on the right of the stem and the lower on the left. If the chord contains an odd numbered cluster of notes a second apart (such as C, D, E), the outer two will be on the correct side of the stem, while the middle ...

  7. Slur (music) - Wikipedia

    en.wikipedia.org/wiki/Slur_(music)

    A slur is denoted with a curved line generally placed over the notes if the stems point downward, and under them if the stems point upwards. Prime functions of the slur in keyboard music...are to delineate the extent of a phrase line and to indicate the legato performance of melodies or arpeggiated chords. [1]

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  9. Bar (music) - Wikipedia

    en.wikipedia.org/wiki/Bar_(music)

    Whether the music contains a regular meter or mixed meters, the first note in the bar (known as the downbeat) is usually stressed slightly in relation to the other notes in the bar. Igor Stravinsky said of bar lines: The bar line is much, much more than a mere accent, and I don't believe that it can be simulated by an accent, at least not in my ...