In a concerto, there is a section called the cadenza. what is this?

In music, a cadenza (from Italian: cadenza [kaˈdɛntsa], meaning cadence; plural, cadenze [kaˈdɛntse]) is

Explanation:

generically, an improvised or written-out ornamental passage played or sung by a soloist or soloists, usually in a "free" rhythmic style, and often allowing virtuosic display.

The term cadenza often refers to a portion of a concerto in which the orchestra stops playing, leaving the soloist to play alone in free time (without a strict, regular pulse) and can be written or improvised, depending on what the composer specifies.

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