What are multiple audio tracks for?
Multiple audio tracks are used for features like having different language tracks or director commentary. Sometimes 5.1 surround sound and regular stereo sound are offered as separate tracks. Even though DVD players automatically down convert 5.1 surround sound to stereo sound for systems that aren’t capable of playing 5.1, supplying a separate track insures that the audio is exactly the way its intended to be. Things can get lost in the down conversion.
Multiple audio tracks are used for features like having different language tracks or director commentary. Sometimes 5.1 surround sound and regular stereo sound are offered as separate tracks. Even though DVD players automatically down convert 5.1 surround sound to stereo sound for systems that aren’t capable of playing 5.1, supplying a separate track ensures that the audio is exactly the way it is intended to be.