[MPlayer-users] cdda:// -ac ffdts

[Alexander Roalter]

Ergzay wrote:
> On 2005/09/22, at 1:26, ACS wrote:
> 
> 
>>>AudioCD can't be DTS. If you're saying it can, then show us the 
>>>standard
>>>that says so.
>>
>>Do some google-ing yourself.
>>At the start of DTS sound in theatres, it was all audio CD source.
>>timecode stuff was used to timesync audio to the video.
> 
Sorry for reading this so late, but Audio-CDs with dts never existed. 
The CDs used in theaters to store the movie audio int the system dts 
(which has not really *that* much to do with the dts stream found on 
DVDs) is on a CD-ROM and is accessed as a file rather some obscure Audio 
CD format. It's like having a WAV (or somewhat compressed) file with 
timecode meta infos, and the player/projector's sound unit plays the 
audio sample with the appropriate sample number, given to him from the 
projector. This format at first was secret and later was cracked, so it 
is possible for projectionists to copy the CD-Roms delivered with the 
film reels and extract from them the digital audio, also a reason why 
some major distributors did not ship their films with DTS recently. This 
situation has improved lately, since the DTS on CD-ROM standard has been 
altered (via the option that a new codec/encoding/decoding algorithm has 
been delivered on newer Soundtracks, which updates the player hardware. 
Older DTS-Hardware is not able to update itself, so these had to be 
replaced (or go back to play SRD or SDDS or even Analogue).

Now to my knowledge, the new DTS has not (yet) been hacked.

hth,
Alex