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Author Topic: Digital 5.1 Sound  (Read 32 times)

precys

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Digital 5.1 Sound
« on: May 25, 2006, 01:19:00 AM »

Well, let me explain everything as well as i can. I have a recent build (i believe its an april build by tech) i plan on gettin the latest release when im able to get online to download, but im currently on my phone typing this lol. I have my xbox connectted thru an optical cable. now for the problem, i'm not sure how to get the xbox to play my avi file with 5.1 sound (yes the file has ac3 5.1 audio). Actually, it plays but the settings and the file description (black button while file is playing) throw me off, so let me try to explain a lil more what i mean.

If i go to the settings menu and the audio hardware option is set to "analog" i play the file and i hit the black button for the audio/video file description and it says

audio: (AC3-liba52) CBR br:448000 sr:48.00 khz chns:6

also in the "audio and subtitle settings" that you activate while the video is playing, it says the "audio stream" is "unnamed (1/1)" and i can't select "output stereo to all speakers" and i can also turn the volume down thru xbmc

BUT on my reciever, whenever im getting a 5.1 or 2.0 digital signal it shows the speakers that are being used (5.1 shows the 6 speakers) and it doesnt show that on my reciever.


NOW

if i go back to the system settings and switch the "audio hardware" to digital and the 2 options below selected (AC3 capable reciever and DTS capable reciever) then when i go back to the same video and watch it, it says the following in the audio/video file description

audio: (AC3 through SPDIF) CBR br:448000 sr:48.00 khz chns:2

and in the "audio and subtitle settings" that you activate while the video is playing, it says the "audio stream" is "stereo" and i can select "output stereo to all speakers" and i cant turn down the volume thru xbmc

BUT on my reciever, i get the 5.1 speakers displayed


So, basically, xbmc is sayin one thing and the settings and my reciever is saying another. Also, it seems like they both sound the same as far regardless what it says its playing, it sounds like stereo and sound only from left and right. i've done a search and couldnt really find anything specific like this.
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Senor Chief

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Digital 5.1 Sound
« Reply #1 on: May 25, 2006, 04:57:00 PM »

ok.. i think you are playing the 5.1 correctly..i dont think xbmc can amplify a dolby track... i too have surround sound, the volume bar moves up and down but it doesnt get any louder (when dolby is on).
Ac3 Liba (i think) means that your dolby track is playing through 2 speakers (right & left)
When ac3 through spdif shows...spdif meaning (Optical cable) all sound is being played through all speakers. When ac3 through spdif shows do you have the Dolby 5.1 on your reciever?
If so i think that you have everything right..

ps: all "Output stereo to all speakers " does is take what (Stereo) track that you play and send it to the rest of your speakers (Dolby 5.1 should show up on reciever)..when dolby is on ..all i notice is that it turns the volume up a lil' (5.1 should still be on the reciever).
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precys

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Digital 5.1 Sound
« Reply #2 on: May 25, 2006, 08:29:00 PM »

sounds like a good explanation to me lol and now i'm actually able to hear the 5.1, i couldnt lastnight tho since it was around 4am but this afternoon i was able to turn it up and was able to hear the dif discreet noises from each speaker. thanks for the help and explanation also.
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