Covers the usual topics - Atmos mixing philosophy, workflow, etc - plus their work on the four Zappa 5.1/Atmos releases currently out. It was also interesting to hear that they mastered the quad mixes of Over-Nite and Apostrophe for the Blu-Rays (I don't think they're credited for this in the box set liners?).
https://immersiveaudioalbum.com/qa-erich-gobel-and-karma-auger-on-mixing-frank-zappa-in-dolby-atmos/
https://immersiveaudioalbum.com/qa-erich-gobel-and-karma-auger-on-mixing-frank-zappa-in-dolby-atmos/