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Hi. I recently bought raspberry pi 2 and installed newest OpenELEC on it.
I have many movies with dts 5.1 sound, unfortunately my tv supports only Dolby Digital via hdmi.
Using my notebook, dts -> AC3 transcoding works flawlessy. On my pi I can only hear stereo sound.
I set number of channels to 2.0, activated decoding on external device, checked Dolby Digital (AC3) capable receiver and Enable Dolby Digital transcoding.
As I said it looks like audio is downmixed to 2.0.
However, on this settings I get full 5.1 on movies, that already have dolby digital audio.
I have pi 1 too, it has the same problem plus it usually can't keep up with audio.
What should I do?
Thanks
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Can you try disabling omxplayer in video/acceleration settings.
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2015-02-23, 01:11
(This post was last modified: 2015-02-23, 01:12 by l0udpl.)
I'm using Philips tv (2013 or 2014 model) with some kind of old Panasonic home cinema system connected via optical link.
Previously I had Sony TV too (older model) and I was using dts passtrough on notebook with xbmc.
As I remember that Sony TV was kind of annoying, because I had to manually switch it to "external speakers" (or something like that) via menu triggered by "Options" button on remote. Otherwise it would downmix to stereo and after that pass it via optical link.
I'm afraid it's not going to help you as you're getting noise only. I may test new raspberry on that old TV, but it'll take around a week as I don't have access to it right now...
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Thank you.
You're right, I have to manually switch to external speakers in tv, otherwise it downmixes.
I can get passthrough with omxplayer, problem is with dvdplayer. I want to do the same as you, ac3 transcoding because tv doesn´t pass dts signal to receiver.
If you don´t mind, it would be helpful to know if you can do ac3 passthrogh in your Sony tv.
Regards
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I've tried the version he says, xbmc 13.2 with openelec 4.2.1 and it doesn't work. His device is an Ouya.
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I couldn't tell from the posts whether you were using a receiver and speakers or just the tv. In my system all signal producing devices (Bluray, WDMP. Pi etc go to the receiver first through HDMI and a single HDMI feeding the TV input (Toshiba) . The TV is only used for a picture, all sound is handled by the receiver. No problems with any kind of decoding
HWF
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Kind of repeating what Harpanet13 says, but I have all Sony equipment (TV, PS3 as BluRay player, and DTS Home Theater receiver). I found that if you put the TV in the middle (playback device --> TV - Audio Out via HDMI --> Home Theater Receiver), it down mixes the signal, even with HDMI passthrough enabled. The only way I could get 7.1 sound on my blue-rays was by direct connecting the device to the Home Theater (device --> Home Theater - Video out via HDMI --> TV). This setup can be a pain, because you have to use two remotes when you want to switch the source device, but it was the only way I could get full theater audio.
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I think that with tv in the middle you can only get ac3 passthrough, and you need to tell the tv to use external speakers, because if not it downmixes to stereo.
You can run tvservice -a in a raspberry to see the tv supported codecs