Today we're going to be adding sound and/or music to our animation. This works similar to importing a picture. Simply go to FILE > IMPORT > IMPORT TO LIBRARY and select a WAV or MP3 file. To see what's in your Library, select CTRL+L and it will open in the bottom-right corner of your window. Next you just need to click on the frame that you want sound, then drag the sound clip from the Library to your Stage.