Eine Kleine Nachtmusik [Ger.]

“A Little Night Music”; Mozart’s title for his Notturno or Serenade in G major for string ensemble K. 525 (1787). It was originally in five movements, of which the second, a minuet, is now lost. Although it is often performed with orchestra, it was evidently intended for performance with one player on each part.

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allegro [It., merry, lively]

(1) Fast. Although the term has been used since the 17th century to indicate a fast or moderately fast tempo and is the single most widely used term for such a tempo since the 18th century, it continued to be used into the 18th century as an indication of character or mood without respect to tempo. (2) A movement in a fast or moderately fast tempo, especially the first movement, in sonata form (whence sonata-allegro), of a sonata, symphony, or similar work.

tessitura [It.]

The particular range of a part (especially a vocal part) that is most consistently exploited, as opposed to the total range or compass of such a part. Thus a soprano part may have a high or low tessitura. 

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