Comments

TheHappyFriar wrote on 11/13/2005, 6:27 AM
i'd assume it has the same advantate of a high bitrate mp3. Just more headroom for more audio detail.

High-end sound systems might notice a difference.
HHaynes wrote on 11/13/2005, 9:27 AM
has a hard ceiling on data rate - 640kb/s.

If you're interested in having multi-channel audio at higher data rates, you should go to something like (which Vegas does not directly support). The 1.5Mb/s data rate translates to essentially a lossless encode of the data. Of course, that means that the video data rate has less room to move through, so you have to make sure that the standard data pipe for DVD video is not compromised by the increased audio signal width.

As we move to Blu-ray and HD-DVD, the data pipe will not be a constraint, which I'm sure has something to do with DTS becoming a standard supported codec for those formats.

For stereo signals, the higher data rate will provide better channel seperation and less of a "hole" in the phantom center.
riredale wrote on 11/13/2005, 9:28 AM
I guess one way to find out would be to encode a short passage at 192 and 384, then decode them and put them on their own timelines in Vegas. Sync them up perfectly and see what comes out when you reverse the phase of one of them.

I suspect you'll hear a sort of subtle high-end "splatter" that would ordinarily be buried by the main audio output.
farss wrote on 11/13/2005, 1:02 PM
Thanks guys,
I've burnt this baby with ac3 stereo at 384K, I'll have a listen, see how it plays and sounds.
I figure as mp3 at 192K isn't too shabby and ac3 is a more advanced codec it shouldn't be too bad but then it dawned on me that as I had the space and the bandwidth to spare on the DVD why not use the higher bitrate. I guess most of us (me included) are just glad to get ac3 to encode without the levels going south that we've never looked further into what the encoder is capable of.

As to DTS, well the cost of the encoder is a bit of a put off, and the amount of bandwidth it takes from the vision. If you're encoding straight from scanned 35mm that mightn't be an issue. I suspect the whole design of the DVD spec was based on just that with being able to fit typical video on there a bit of a 'well it should be OK' kind of thing.

I know I've said this before. DTS is simply gone from cinemas down here, they've still got the logos around the place but the gear was removed some time ago which is perhaps a pity. The Dolby Digital data on the film is pretty fragile and once that cannot be read it's back to the linear stereo track. That uses Dolby SR which is quite a good sounding system but no surround of course. What seems to have killed off DTS is probably simple logistics, keeping track of prints is one thing, add a stack of CDs to the equation and it's a burden the cinemas will gladly go without.
Bob.