The recorder is a woodwind
Woodwind instrument
A woodwind instrument is a musical instrument which produces sound when the player blows air against a sharp edge or through a reed, causing the air within its resonator to vibrate...

 musical instrument
Musical instrument
A musical instrument is a device created or adapted for the purpose of making musical sounds. In principle, any object that produces sound can serve as a musical instrument—it is through purpose that the object becomes a musical instrument. The history of musical instruments dates back to the...

 of the family known as fipple
A fipple is a constricted mouthpiece common to many end-blown woodwind instruments, such as the tin whistle and the recorder. These instruments are known variously as fipple flutes, duct flutes, or tubular-ducted flutes.-How it works:...

The flute is a musical instrument of the woodwind family. Unlike woodwind instruments with reeds, a flute is an aerophone or reedless wind instrument that produces its sound from the flow of air across an opening...

or internal duct flutes—whistle-like instruments which include the tin whistle
Tin whistle
The tin whistle, also called the penny whistle, English Flageolet, Scottish penny whistle, Tin Flageolet, Irish whistle and Clarke London Flageolet is a simple six-holed woodwind instrument. It is an end blown fipple flute, putting it in the same category as the recorder, American Indian flute, and...

. The recorder is end-blown and the mouth of the instrument is constricted by a wooden plug, known as a block or fipple. It is distinguished from other members of the family by having holes for seven fingers (the lower one or two often doubled to facilitate the production of semitones) and one for the thumb of the uppermost hand.