Mondo Knows Facts

A string quartet is two violins, a viola and a cello

Four lines let the parts be heard separately without a conductor The form settled in the eighteenth century as chamber music for small rooms. Haydn wrote dozens and set the pattern of four movements. Players rehearse without a leader besides the first violin. It sits in Mondo's music collection, one of 200 facts that each trace back to the reference below.

Where this comes from

Britannica

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Tags: chamber-music, strings, forms

A string quartet is two violins, a viola and a cello: the short answers

Where does this come from, and can I check it?
Four lines let the parts be heard separately without a conductor. The figure is taken from Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a music fact?
Yes. It sits on the Music shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?
The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.