wind instrument sounded by lip vibration against a cup mouthpiece; it was one of the leading wind instruments of the period 1500-1670. It is a leather-covered conical wooden pipe about 24 inches (60 centimetres) long, octagonal in cross section, with finger holes and a small horn or ivory mouthpiece. Its compass extends two octaves upward from the G below the treble staff. Other sizes of cornett included the descant; the S-shaped tenor; and straight forms, including the mute cornett, with the mouthpiece cut in the head of the pipe itself.
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