… and keep in mind that Ambisonics (especially HOA) is considered to be an “unsupported feature” by Steinberg.
Thank you for your response. Yes, bypassing the panner is an option but in the manual it is stated that even if you bypass it, it will continue trying to “downmix” (or the opposite) if the input and output of the channel are not the same. The only true way to bypass it is to set the output to 3rd Order Ambisonics (->IN 3oA / OUT → 3oA) but…if my out is also a 3oA bus, how am I going to LISTEN! to my decoded audio? It’s funny…
Yes, I found that Ambisonics is NOT officially supported by Steinberg browsing this forum… Its a pity. I want SO MUCH to love Nuendo and leave behind me Pro Tools because the…well known reasons… but something I did in Pro Tools in 5 minutes is finally IMPOSSIBLE in a DAW that has a strong marketing point towards immersive and spatial audio. So, ambisonics is easier in ProTools even if they don’t even bother to advertise it in their web page…? I hope I am wrong
That’s why I said: Load a Standard Panner and bypass this one. Actually it’s super-easy once you know what to do.
Here’s an example, including IEM’s AllRADecoder:
3OA to 5.1.4.npr (175.1 KB)
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PS … the mixer channel will look like this then:
PPS: Be aware that this setting will be ignored when you merge-in data from other Projects!
→ Panning-slot plug-ins can't be merged in from other Projects - #4 by Dietz
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Thats how support should be like! I really appreciate your effort. Thank you, I 'll study your example project when I’ll be back in the studio. It seems quite logical btw.
@Dietz thanks for your response. I tried your approach but I couldn’t load the standard panner, as it wasn’t available in the list of panners. Strangely enough, in your example project it was available. Is there anything I need to do in order to make it available?
I want to go from Ambi 1st order to stereo binaural (for monitoring purposes).
Best, Robert
Sorry, hard to tell from the distance, especially taken out-of-context.
Sorry, I thought the OP also asked about routing ambisonics to a stereo bus (for binaural monitoring purposes). Didn’t want to hijack the thread.
However, I experimented further with your project and it works - as long as the ambi track is routed to an output with more than 2 channels. As soon as it is routed to a stereo track, the option to insert the stereo panner disappears. Strange.
Ok, that makes sense. That’s why the panner is there when routing to an output with more than 2 channels. Logical.
But then Dietz’s workaround is not possible for that scenario (monitoring an ambi track with a plugin that offers no dedicated panner).
Hi, OP here! I’ve managed to bypass the VST MultiPanner since it’s easy after switching to the Standard Panner and my setup works fine but yes, I need now to find now a way to be able to hear the decoded signal binaurally via headphones. I mean, having the 5.0 monitors and my headphones playing the binaural version of my project simultaneously. Any ideas?
Yes, halfway. 
Written at the end of a long day’s work. Correct it should read: It doesn’t work in stereo. (My answer above wasn’t worded correctly, so I deleted it.) That’s why it works in Dietz’s project, because there’s something to pan. But in stereo, Nuendo apparently thinks there is nothing to pan. (LRC is the first that works.)
But Dietz might have a solution for that too. He has been working with Nuendo a lot longer than I have. So my answer is with reservations. 
→ that was my hope in the first place 
Like I wrote before: I have too little information to offer meaningful suggestions. The screenshot is hiding the decisive parts of the routing. 
Have you looked at the exemplary Nuendo-project I posted in an earlier message of this thread? Maybe the answer is there, already.
I think I found a solution: Instead of using the standard panner, I used the free dearvr ambi micro panner and this one can be bypassed! I compared the signal using supervision before and after the panner and it seems unchanged.
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Looks like a sensible solution. … but couldn’t you use DearVR itself as the binauralizing device in the first place? Or do you dislike its results?
Yes, of course that would work, but to my ears dear vr’s binaural decoder has quite a distinct sound, not very neutral.
I have to admit that I never used the “micro” version, but the full-fledged DearVR Monitor allows for very detailed parametrisation of the binauralisation and is able to provide very clear results (maybe a bit “unexciting”, in the worst case) . Me likes!
I never tried/had the full version. The vr micro sounds a lot too exiting to my ears. So far I got the best results with using the stock ambi panner but by loading the KU100 sofa from this database.