adywan said:
Vegas is great for creating a 5.1 track if you want to sync the track to video. Although you can't export it as a DTS 5.1 file, you can export each track separately as mono uncompressed wav's and import into a DTS encoder. But if it is a 5.1 track then shouldn't you have 6 PCM files and not 5? Or is this what you are asking, that you need to create a LFE channel from scratch?
Yes....I believe the LFE for DTS audio is supposed to be extracted from the rears.