lrossouw;495699 Wrote: > 2) How does Audio Extracter do the 5.1->2channel? How does it decide > what to keep / how to keep it?
Unless Audio Extractor is reading the DTS metadata, which I doubt it is, it's probably combining at the 'typical' film-mix ratio which would be: L & R at unity gain Center at -3dB Ls & Rs at -3dB LFE off > 3) Or to put it differently if I had to keep one of A or C which should > I keep (in theory)? I understand that the DTS is lossy compression so > that would tend me to A. But C has 48khz sampling so that would pull me > to C. EDIT: From some further reading it seems that I should probably > stick with A for a stereo version. I.e. the extraction process assumes > *something* constant(?) in terms of mixing the channels whereas the CD > has what the band\engineer thought best to mix for each situation/track. > The 48k SR of the DTS means nothing!! It's an encoded file and MUST be 48k to sync with video or to PLAY as a DVD. The material can be 96k/24bit in 5.1 but the encoded stream MUST come back to 48k. When you decode it, if it is a higher SR, then it will playback that way. To be honest with you, the DTS downmix should sound quite different than the CD version, as it's a software 'guess'. > 4) There was a 5.1 AC3 as well but I gather that the DTS is better? Is > this right? Or is it more subtle than that? This is more of a user thing. There are a lot more DVD players out there that are licensed for Dolby AC3 than there are both AC3 and DTS. They're just giving you a choice. That being said, AC3 is only capable of 48k/24bit as its original source, where as I've stated above, DTS can do 96/24. > 5) I tried the DVD that came with another CD I had and it had LPCM > 48khz,16bit (2ch) audio data. I presume this should in theory be better > than the CD data (as both are lossless but the 48 beats 44)? Although > in this case the tracks are not exactly the same on the DVD versus the > CD. Again, IMHO, that's your choice. The difference between 44.1 & 48k isn't a deal breaker, but 16bit vs 24bit is a GREATER difference. If you like the 48k version since it's different, let grab it, too, and TAG it as 48k. I do this a lot. I'll have a CD rip but also 48/24 or 96/24 rip and keep them all on my server. -- Eric Seaberg Eric Seaberg - San Diego A.E.S., S.M.P.T.E., S.P.A.R.S. [email protected] ------------------------------------------------------------------------ Eric Seaberg's Profile: http://forums.slimdevices.com/member.php?userid=7896 View this thread: http://forums.slimdevices.com/showthread.php?t=19260 _______________________________________________ ripping mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/ripping
