Dolby digital and dts

Posted on Wednesday 17 March 2010

  • this is a simple question and i have not noticed it before. any movie i watch is fine and dvd's work great as well. i was watching gladiator last night and it did not come up in dts why is this? i have my audio ouput set to digital and ac3 capable rec and dts capable rec. is checked off. so i don't understand... anyone

    th3_h0und


  • this is a simple question and i have not noticed it before. any movie i watch is fine and dvd's work great as well. i was watching gladiator last night and it did not come up in dts why is this? i have my audio ouput set to digital and ac3 capable rec and dts capable rec. is checked off. so i don't understand... anyone

    th3_h0und
    i have a similar problem..

    i have dts tracks (.dts) which light up as dd on my receiver. i know that if i enable digital out of the xbox, the signal is dd anyway because i selected all speaker output, but my point is that even so, the track does not get detected as dts, but rather seems to get decoded by the xbox and re-encoded on the fly as dd. i believe it's still surround (5.1) but it's xbmc re-encoding instead of having the original dts stream.

    is xbmc not supposed to pass-through dts like it supposedly does dd ac3? i say supposedly because now that i've found this i don't know if ac3 is being passed through or processed just like the dts track.

    i checked the forums but saw nothing on the topic.

    hound,

    many movies with dts do not enable it right away, you need to select it from the audio menu before it becomes active. usually the default audio track is dd 5.1.


  • i think i just found the culprit change in the changelog:

    - 20-08-2004 changed: passthrough of ac3/dts is always used unless samplerate != 48khz or output to all channels is enabled, and the source is stereo.



    ... most .ac3 and .dts tracks are @ 44.1 khz - development team, if you are listening, please accomodate this issue, otherwise the xbox is doing unnecessary processing.

    thanks


  • by .ac3 and .dts tracks, i meant audio cds

    i do agree that movie ac3/dts is 48 khz,

    regarding the xbox hardware limit, that is interesting...


  • i have the same issue with the right thumbstick not working for volume but only when mp3s are playing. i think this happened when the mplayer moved under the system folder (or paplayer took over).

    also i noticed for the first time that moving the right thumbstick to the right or left while media is playing will allow you to seek to any place on the timeline. rather nice.


  • have you enabled ac3 & dts capable receiver ?


  • ... most .ac3 and .dts tracks are @ 44.1 khz - development team, if you are listening, please accomodate this issue, otherwise the xbox is doing unnecessary processing.
    that's just plain false.

    most (if not all) audio on moviedvd's is ac3/dts format in 48000hz.

    *only* time dts is in 44100hz is when it's a dts-audiocd (which we don't support)

    ps - it's not possible to send dts_44.1 passthru'ed or any other 44.1 source for that matter: xbox hardware limitation







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    rose @ March 17, 2010 edit
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