One of the exciting features introduced in Flash MX was the ability to load MP3s at runtime using the Sound class. In this chapter, we create an MP3 jukebox application that enables users to load MP3 files from various locations. The user can create a playlist of songs and play them back. To make things extra saucy, we also add a five-second cross-fade between songs. Refer to Chapter 13 for basic recipes regarding sound playback. Refer to Chapter 14 for information on recording and publishing audio with FlashCom.