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I’ve been experimenting for a few days, disconnecting and reconnecting cables, and finally I solved it!  The problem was with the A.Aux cable that was connecting the BC9500 to the 1611. I had another A.Aux cable which I use along with a BL Passive to drive my BV Cona subwoofer, so I swapped those two A.Aux cables, and I no longer get the buzzing feedback whenever the display updates on my Pentas.  Luckily, whatever the problem was with the particular A.Aux cable, it does not seem to cause any issues driving the BC Cona via the BL Passive.

Great you figured it out. It could be an issue with a loose connection on the datapin (pin 6) or just issues with shielding i that particular cable. The Passive is not using the data pins when it is working as an amplifier for passive speakers so this can explain why you do not have issues with the cable in that setup.

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I’ve tried every setting but I get nothing – the digital coax inputs on my old BV7 must not be working (I’ve tried all 4).

I just took this screenshot from the BV7 reference book. Don't know if that information is usefull? On the newer Beovisions you have to enable digital audio in the connection menu for the socket you wan't to use it with. From reading the text in the gren box I asume the same applies for the BV7 and that it should be possible to use either of the 4 sockets.    

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I’ve been experimenting for a few days, disconnecting and reconnecting cables, and finally I solved it!  The problem was with the A.Aux cable that was connecting the BC9500 to the 1611. I had another A.Aux cable which I use along with a BL Passive to drive my BV Cona subwoofer, so I swapped those two A.Aux cables, and I no longer get the buzzing feedback whenever the display updates on my Pentas.  Luckily, whatever the problem was with the particular A.Aux cable, it does not seem to cause any issues driving the BC Cona via the BL Passive.

Great to har you solved the issue. Very possible something to do with the data wire in the particular A.Aux cable (loose connection, bad shielding etc.). The reason you do not have the issue with the Beolink Passive is probably because that do not utilise the Datalink connection when the Passive is just used as an amp.  

Great to har you solved the issue. Very possible something to do with the data wire in the particular A.Aux cable (loose connection, bad shielding etc.). The reason you do not have the issue with the Beolink Passive is probably because that do not utilise the Datalink connection when the Passive is just used as an amp.

Regarding the digital conenctions. On newer Beovisions in the connection menu setup you have to choose if you wan't to use digital audio for the connection you are setting up. I don't know if it's the same on the BV7, but reading about it in the reference book for the BV7 sort of indicates that when I read about AV4.

Of course there can also be specific software versions with issues in this regard. I am no sure if a full software revision overview is available anywhere

Yes the BV7 has the same - in the connections menu you can choose to use one of the digital coax inputs for digital audio (A1 to A4).  I've tried all 4 and none work.

The reason I stuck with the old BV7 is that is has a dedicated Powerlink output for Cinema Centre, which I have connected to a Beolab 7.4 in the centre of the room.  That takes over as the centre speaker when the BV7 is put into cinema mode.

I rarely use the BV7's own screen and instead use the projector when watching movies or gaming, so I think I will look out for another Beosystem 3 (Mk2 or 3).  One will come up on eBay, if I'm patient.

 

Another option could be a Beosystem 4 although it might be more expensive and more seldom show up used.

As that is NL based it could probably solve your source issues in the ML part of the system

I have a full MCL system with multiple link rooms and a BC9500 (with BG9500) as the master, with two way remote controls. The challenge integrating this with Masterlink is that there can only be one Audio Master. And I have a full Masterlink system with BS9000 Bm5/BS5 Passive BL 3500 BV7-40. What I did was have Sounds Heavenly make a crossover cable that goes from the Tape 2 on the 9500 to the A. AUX on the Bs9000. Now I can play a record on the BG9500 and hear it on the Masterlink System. I also have many Network Link products connected to Masterlink via the Beolink Convertor. In that way I can listen to CDs and FM Radio on the prior generation Network Link products (before Mozart, which does not appear to support Masterlink integration). I have a Beosound Core connected to the AUX input on the BC9500. That enables me to listen to stream sources on the MCL and the Masterlink systems.

Hope this helps.

-Gregg

That does help, thanks, it hadn't crossed my mind to get a custom cable.

I'm going to wait until I have replaced my old BV7 with a Beosystem 3, then I'll start experimenting further!

What I (and probably many of us) love about B&O is the way it works together, for example when I press Play on my Beogram 9500, the speakers connected to my BV7 switch on and I hear it.  I'd like the same for the BS Moment but I honestly don't think that will be possible when I also have a Beocenter 9500 as an A. Master.

It's not working too badly though - given that the BS Moment can be easily controlled from its own screen, all I have to do is select TP.2 as the source, then I can play from the BS Moment using its own screen, which I keep within arm's reach.