AVANT 55 muti channel DTS? audio issues

HI all,

i purchased BV avant 55 recently.Here is my bulid,

BV avant 55;

+two Beolab 4  

+Beolab receiver + MK3 powerlick cable

+Sony blu-ray player S6500

As we all know Avant has bulit-in 3 channels. i add my old beolab 4 as rear side speakers, so there is a 5.0ch system now.

When I play my blu-ray disc with the build for the first, i got buzz shaking sound all the time. so i checked both the player and the TV system.  The player output "DTS-HD Master audio 7.1ch 48khz" audio source. But the TV recognized that as “DTS 5.1", and output " 5.0 (TRUE IMAGE)". Then I changed audio setup of the movie to "DD5.1", then all works fine.i believed that is channel issues. no big deal.

Here comes today, i played my new discs, with audio source "DTS 5.1", i got that buzz sound again! Thankfully, the discs also has "DD 5.1", and that can work. Then i tried every blu-ray discs i have, here is what i  found,

muti channel Audio source with DOLBY DIGITAL works fine, even 7.1ch as well. (But of course, the TV system would still recogniized that as 5.1ch, and out 5.0.  ) JUST DONT WORK WITH DTS.

so am i miss some point that could able to be fixed, or the system just dont play DTS?

 

 

In audio settings of your bluray player you should select PCM output. As beovisions do not decode DTS. Your player should decode this signal. During playback you do should select DTS as audio track.

 

jinbo:

As we all know Avant has bulit-in 3 channels. i add my old beolab 4 as rear side speakers, so there is a 5.0ch system now

I doubt this is correct. But correct me if I'm wrong. Isn't it a stereo setup with a sub?

jinbo:

The player output "DTS-HD Master audio 7.1ch 48khz" audio source. But the TV recognized that as “DTS 5.1",

That is correct. The BV does not decode DTS HD MA (or DD TrueHD). So the Dts core of the signal is reproduced. Normally the BV has to be fed with a (MultiCH) PCM signal to reproduce DTS HD MA or DD TrueHD. So setup your BR player to decode the audio and transfer it through HDMI as PCM.

jinbo:

Here comes today, i played my new discs, with audio source "DTS 5.1", i got that buzz sound again

Was the input format to the BV an original digital dts/dd signal not a pcm? Alternative: use a SPDIF cable between the BR player and the BV. Alternative use the BR decoder and send the multich signal through HDMI to the BV as PCM

 

Carolpa:

jinbo:

As we all know Avant has bulit-in 3 channels. i add my old beolab 4 as rear side speakers, so there is a 5.0ch system now

I doubt this is correct. But correct me if I'm wrong. Isn't it a stereo setup with a sub?

Let Geoff Martin do the correction:

http://www.tonmeister.ca/wordpress/2014/05/09/bo-tech-beovision-avant-audio/

MM

Carolpa:

 Alternative: use a SPDIF cable between the BR player and the BV.

 

@ Carolpa:

Thank you! You've made my day!

Finally. I struggled for weeks, but this simple (extra) cable solved my problems.

I have bought an Android based Openhour Chameleon (4K) player last december. With Kodi installed it is an user friendly powerfull mediaplayer.

But I  could only send DD and DTS files to the Chameleon. Other formats like above described resulted in silence. After plugging in a Spdif cable from the player to the BV9, I can play every file with sound. Formats like DTS-HD ma, True HD etc, I can hear them. no problem, no changing audio-tracks etc.

I made the mistake of thinking that digital audio transferred by hdmi would be the same as by Spdif. Both are digital.So I didn't try a Spdif cable as I expected no differerences in result.

So, I'm glad I tried after all after your suggestion. Thanks.

 

From Wikipedia:

'S/PDIF is based on the professional AES3 interconnect standard.^[1] S/PDIF can carry two channels of uncompressed PCM audio or compressed 5.1/7.1 surround sound (such as DTS audio codec); it cannot support lossless formats (such as Dolby TrueHD and DTS-HD Master Audio) which require greater bandwidth like that available with HDMI or DisplayPort.'

 

MM

Thank you Millemissen for the info. Things start to clear.

A quote from another member from a different site was "DTS-HD/DTS-MA has a DTS core, so there's no conversion just backward compatibility.".

With this in mind I thought that the BV9 (and other system 3 based sound engines), would extract the DTS core from these formats. This thought was strengthened by the idea that even the BV11 can't handle these newer formats and probably would downgrade the lossless audiostream.

There is no problem there at all!

just set the Bluray player to decode  - to PCM (sometimes figured as LPCM).

Every good Bluray player handles decoding to multichannel PCM.

- and of course pick the right soundtrack in the BR-menu -

Since Bluray discs are the only (legal) source for the HD sound formats, there is no need for having a decoder in the tv.

MM