Slide whistle

A slide whistle (variously known as a swanee or swannee whistle, lotus flute, piston flute, or jazz flute) is a wind instrument consisting of a tube with a piston in it, and a fipple mouthpiece similar to a recorder at one end. This enables the player to vary the pitch with a slide while blowing the whistle, producing an ascending or descending glissando. Because the air column is cylindrical and open at one end and closed at the other, it overblows the third harmonic.

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