reed; others require buzzing into a metal mouthpiece, while yet others require the player to blow into a hole at an edge, which splits the air column and creates the sound.

Methods for obtaining different notes

* Using different air columns for different tones, such as in the pan flute. These instruments can play several notes at once.
* Changing the length of the vibrating air column by changing the length of the tube through engaging valves (see rotary valve,

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