The range of pitches where a vocal part lies most comfortably and frequently, as opposed to the total vocal range. It refers to where most of the notes in a piece sit, determining whether a role will be comfortable or taxing for a particular voice type.
From Italian 'tessitura,' meaning 'texture' or 'weaving,' derived from 'tessere' (to weave). The musical meaning emerged in the 19th century, metaphorically referring to how vocal lines are 'woven' within a comfortable pitch range, like threads in fabric.
Tessitura is why a soprano might struggle with a mezzo role even if she can technically hit all the notes—it's not about the extremes, but about where you live most comfortably! Wagner was notorious for writing roles with punishing tessituras that sit in the most taxing part of a singer's range for hours.
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