Presented in DTS and Dolby Digital the soundtrack is a master class in the art of atmosphere. All five speakers (and the subwoofer for that matter) are used to create two realistic worlds for Cole to inhabit, the bustling streets of '96 Philly and the future world of underground claustrophobic living. The surrounds are used to generate spot effects and background noise which envelops the listening position to great effect. Dialogue is rich and intelligible throughout and the haunting score is used to brilliant effect. I remember seeing this movie in the cinema on its release in DTS and was amazed at the time with the effectiveness and loudness of the sound mix; this is thankfully captured on this disc in all its glory. The DTS track really stands out against the Dolby version, Effects are easier to place and the bottom end is tighter and better controlled. The DTS mix here does the same job as the Jurassic park disc, it immerses you in the action sounding clear, crisp and loud when required, brilliant stuff indeed.