Wind instruments use a column of vibrating air to produce a sound. By changing the length of the column of air the player can adjust the pitch of the sound. The longer the column the lower the pitch. Some instruments require a reed to start producing the vibrations others the player makes a raspberry sound into a mouthpiece. Recorders and flutes just require air to pass into a mouthpiece to produce a vibrating column of air.

Where are these instruments being played?

Is anyone else nearby? How can you tell?

How are they making their sounds?
