DVD Studio Pro 4 supports additional Digital Theater Systems (DTS) audio formats.
You can now use DTS ES audio that contains up to 6.1 channels, as well as audio that has up to a 96 kHz sample rate and 24-bit sample size. Important: All DTS audio imported into DVD Studio Pro must use the compacted file format (files with a ".cpt" file extension).
Note: All DTS audio files that you import into a DVD Studio Pro project must use at least a 48 kHz sample rate. DTS files with a 44.1 kHz sample rate produce unusable results.