Hi Viktor, we just released Submix Recording in 4.20 which allows you to record the stereo output of any Submix in the graph including the master out. Most of our focus this past year has been to support all of our various platforms and to work toward ensuring the new Unreal Audio Engine is properly battle-tested, optimized, stable, hardened, etc. Our current primary objective is to ensure that the new Unreal Audio Engine is AAA shippable. We’re eager to work toward this goal so we can get out of Early Access state.
Submixes are where spatial audio is encoded to the device format. As an efficiency, we initialize the Submixes to whatever the device output format is. This way people with stereo devices (like an iPhone) aren’t rendering Surround sound (which would cost a great-deal more resources). We are interested in channel agnostic approaches to Submixing but FOA is not as well resolved in the planar vectors as a 7.1 surround, which is our current max surround support format. Yes, FOA gives you a vertical vector, but it is just two directions.
With that said, we do support Google Resonance and FOA soundbeds decoded through either Resonance or Oculus.
Again, as we look to the future, we are interested in clever approaches to soundfield submixing.