8 replies to this topic

[waara]

I have been using OpenPli 6.1 in a VU+ Duo since a couple of months. Works perfectly.
Recently (some five days ago) i made a small change in the Audio settings. I changed AC3 and AAC downmixing to off (both were on) in order to get 5.1 surround in my SONOS surround system instead of downmixed Stereo.

Initially it worked perfectly, but the next day when I switched on the VU+ I noticed that the sound was gone. Dead silence on ALL Sat-channels. I spent some four hours trouble shooting with no success. Reboot, etc etc.
By mistake I unplugged the HDMI (coming from the VU+) from the TV. When I reinstalled the connector the sound kicked in. Worked as a charm until the next day, when it all started over again. Same fix.

The only thing I've changed are the two settings as above. Has anyone seen this? Is there a work around (other than reverting the downmixing back to were it was before)

 

Bet regards and cheers!

 

Roger

[waara]

Add on: When I go into sound settings and switch the "AC3 downmixing" to on the sound is back. And this before I have to press the green "Ok" button.  After that I can change settings back to "Off" and getting Surround until next time I switch on the VU+.

Sound to me like a bug..

[Pr2]

First question: is your Sonos equipment capable to decode AC3 and AAC signal?

From what you describe I am not srure it is.  Or the channel you are watching is using AC3+ and your Sonos support AC3 but not AC3+

[ims]

First question: is your Sonos equipment capable to decode AC3 and AAC signal?

From what you describe I am not srure it is.  Or the channel you are watching is using AC3+ and your Sonos support AC3 but not AC3+

But he wrote, that it worked ... and then all channels were without audio.

 

I do not know SONO ... it is connected to box or to TV ? Cable ?

[ricki]

 

First question: is your Sonos equipment capable to decode AC3 and AAC signal?

From what you describe I am not srure it is.  Or the channel you are watching is using AC3+ and your Sonos support AC3 but not AC3+

But he wrote, that it worked ... and then all channels were without audio.

 

I do not know SONO ... it is connected to box or to TV ? Cable ?

 

https://www.sonos.com/en/home

[Pr2]

Problem is that he switched from downmix yes to no downmix I don't think that this is so "dynamic", I suspect that I fact downmixing was still active so he get sound.

After a reboot the STB really start with downmix set to NO so he has no sound because in fact the equipment doesn't decode the audio signal it receives.

 

But check on the Sonos side because it seems quite restrictive on what it can decode.

[ims]

"I changed AC3 and AAC downmixing to off (both were on) in order to get 5.1 surround in my SONOS surround system instead of downmixed Stereo. Initially it worked perfectly, but the next day when I switched on the VU+ I noticed that the sound was gone"

[Pr2]

Yes that exactly what I say, he turned OFF the AC3 downmix but it doesn't restart the box to be sure it is working after a restart. So I am not 100% sure that the live switch from downmix from ON to OFF is really working, I suspect that in fact the downmix was still active, since downmix is still active he can heard sound.

I also experienced such strange things myself when playing around with this option when connected to an amplifier.

To be sure that the settings is right, proper stop of both amplifier and the STB is better to be sure that at restart everything works as expected.

 

There is also a parameter to take into account is the ARC (Audio Return Channel) HDMI from TV to his amplifier which can also cause trouble.

[ims]

Live switch on/off has effect without reboot/restart... f.eg. into HDMI goes with turned off downmix on my boxes sound on max volume and cannot be controlled with RC (0 or max only).

I am using it for optical SPDI/F to Technics AV receiver only ...