It's great timing that I see this thread. I've been having very similar issues to resolve. When I had speakers connected directly to my BeoSound 4, the echo was just unacceptable with the NL devices. Ultimately, I connected the speakers to the NL/ML converter instead of the BeoSound 4. Now, everything sounds great. Here are a few observations I've made:

1. An IR eye without the JOIN button will indeed work with the NL/ML Converter. The buttons on the eye just have no function. However the Beo4/BeoRemote One signals will be accepted by the IR eye with the RJ45 cable.Oddly, though, the JOIN command of the BeoRemote would only work with the NL/ML Converter if the IR eye has the JOIN button. It's possible that the reason could have been that I did not power cycle the NL/ML Converter when I connected the non-JOIN IR eye? I'm not sure.

2. The importance of the PRIMARY and SECONDARY linked devices in the NL/ML settings are relevant just for the B&O app when the NL/ML Converter's settings are made such that the NL/ML Converter and its speakers are controlled by the app. With this setting, ONLY the A.Master or V.Master and the PRIMARY and SECONDARY sources are available via the app. Also, when one uses the app to control the NL/ML Converter in this manner, the sources playing on the NL/ML Converter cannot be JOINED by any NL device.

3. In contrast to using the app to control the NL/ML Converter, if you control the NL/ML Converter by using a BeoRemote and an IR eye connected to the NL/ML Converter, you CAN then JOIN the source playing on the NL/ML Converter on an NL device. You also have control of ANY of the sources mapped for IR through the NL/ML Converter's configuration. You're not limited to the PRIMARY and SECONDARY connected link devices.

Thanks for your reply, beojeff.

Is it the case that you have played the sound from video sources on a NL Beovision and found them to be in sync with speakers attached to the NL/ML converter? If so then what I am wanting to happen is certainly possible.

But the more I think about it why is the audio on the M3 and the NL/ML speakers in sync with each other but out of sync with the TV? Everything is surely on the NL side of things so ought to work? The ML side isn't involved at all is it?

The TV sound is definitely ahead of the M3 and NL/ML so it can't be a delay in the TV. I'm really baffled!

Incidentally, thanks for the clarification about primary/secondary on the NL/ML converter. It makes sense to me now having fiddled with various combinations.

MurrayLow wrote:

But the more I think about it why is the audio on the M3 and the NL/ML speakers in sync with each other but out of sync with the TV? Everything is surely on the NL side of things so ought to work? The ML side isn't involved at all is it?

For example the delay time set in different devices must be equal.

As I write this: my Moment is playing. A Beoplay A6 and the BV11 are joined. All three are completely in sync 

beojeff wrote:

3. In contrast to using the app to control the NL/ML Converter, if you control the NL/ML Converter by using a BeoRemote and an IR eye connected to the NL/ML Converter, you CAN then JOIN the source playing on the NL/ML Converter on an NL device. You also have control of ANY of the sources mapped for IR through the NL/ML Converter's configuration. You're not limited to the PRIMARY and SECONDARY connected link devices.

Thanks very much to both Carolpa and Beojeff for you responses. 

I have done some more research and the lag only appears when I add the M3 to my WiFi network. I did this while the TV was playing a TV source through its speakers and the BLC speakers and all was in sync. When I use the B&O app to add the M3, the moment it attaches to the network the BLC speakers slip out of sync with the TV. When I join the M3 to the experience it joins in sync with the BLC but out of sync with the TV.

Is this because you cannot mix wireless and wired speakers?

Thanks.

Murray.

Hi Murray,

There is an inherent delay in sending audio over the network to another device/room, so normally the sending device will delay it's audio output accordingly to remain in sync with the receiving devices.

When the sending device is a TV, this is more complex, as delaying the audio from the TV speakers without also delaying the video would mean the audio would be out of sync with the picture (lipsync issues). 

There are two delay settings you can change, one of 'Wired' and one for 'WiFi', and these are 50 milliseconds, and 1000 milliseconds (1 second) respectively. 

Since the TV is able to delay it's video by a maximum of 200ms, with the default delay values, everything remains in sync when wired, and loses sync when a WiFi connected device is introduced, as you have already noticed.

You can try reducing the 'Network Delay WLAN' value to 200ms which should resolve the sync issue. This does increase the potential for audio dropouts if your WiFi is not up to the task though, so it's a case of try it and see...

This setting can be changed on any one of your products and the rest should mirror the change accordingly. To access this setting on the BV11, go to the menu, highlight SETTINGS and press GO (centre button), then from the settings menu press the Red button immediately followed by GO. You should now be in the customer service menu. Select the Settings menu from here and you will see the delay settings.

Kind regards,

Martin.

Hi Martin,

I have tried changing the WLAN delay to 200ms in the BLC and the delay was much better but not perfect. So I tried 100ms and it seems to be perfect!

I checked the setting in the BV11 following your instructions on how to get to the customer service menu and it has also changed to 100ms. So all seems fine. I live in a small house so I think the wifi signal strength should be OK.

Thanks so much for your help...oh, and stay safe!

Murray.