Consider the following scenario. You play a DVD movie by using Windows Media Center in Windows Vista or by using Windows Media Player 11. You eject or stop the DVD, and then you play audio from an alternative source, such as a music CD or a multimedia audio format. (WMA and MP3 are examples of multimedia audio format files.) In this scenario, the audio may be much louder when you play the alternative audio source than when you play the DVD movie.

Consider the following scenario:

• You use several pictures to create a Windows DVD Maker slide show in Windows Vista.
• You use the Change slide show length to match music length option together with several song files.
• One or more of the song files are MP3 files that are encoded with a variable bit rate (VBR).

In this scenario, you find that the slide show length does not match the song length. Therefore, there are sections of silence between the songs.