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Air and Reeds
Woodwind instruments make sound when air vibrates inside a tube. Some, like the FLUTE, make sound by blowing across a hole (like blowing across the top of a bottle). Others, like the CLARINET and OBOE, use thin pieces of bamboo called reeds that vibrate when you blow on them. The clarinet uses a single reed, while the oboe uses two reeds pressed together (a double reed).