Many thanks for the thoughtful responses - very much appreciated. It looks like the actual Renderer software will be on my shopping list in the near future! When I looked at this I only went as far as loading my test ADMs back into Logic, and didn't really go near the binaural or Apple Spacial stuff as I currently only have work in progress on five or so tracks, with any eventual delivery being quite a way off...I did plan to do a playback event somewhere suitably equipped, and was half expecting to be making revisions on the back of of that. From what you've said, it sounds like there's a possibility that I may get a rude awakening when this happens!Maybe this has been fixed in the latest release of Logic (and maybe you already do all this) - but if you have a copy of the Renderer, I would strongly recommend listening to your ADM's generated from Logic via the Renderer before delivery, just to make sure they sound the way you intended. Particularly heights. You can change the overall level of the heights by using the downmix settings in the renderer, and re-rendering your masters. If find that in some cases overhead material that sounds great in 7.1.4 becomes too prevalent when checking the 5.1 fold down...this isn't a Logic thing, but a Dolby thing. But it can be mitigated with the downmix settings. Lastly, I would also suggest generating BIN's and MP4's via the Renderer and checking those too. I found the Apple monitoring of BIN and Spatial to be completely different than what Logic was playing back. Again, things may be different now with Logic, or you may be doing this already - if so, apologies.