In the learning Module created by CourseLab you can bind audio files to any Object. Use the Sound tab of the Format dialog window, select the audio file to be bound with the Object (the file will be automatically copied into the images folder of the current learning Module).
By default, the sound will start playing right after the Object appears on the Frame. This feature can be turned off by checking the Do not start playback automatically check box. In this case the audio file will be bound to the Object, however for playing the sound, the special action SOUND should be used.
See also Audio files.