My Onkyo receiver support all audio formats up to Atmos. I'm running it through HDMI but yet the only option I have on the portal is PCM Stereo (Including expert mode) so everything sounds like, well 2 channel stereo. Every other component I have (including my old Shaw gateway) supports the proper audio formats. My TV upstairs, which has just stereo speakers and is hooked up to the BlueSky box allows me to choose Expert Dolby Digital. Is this a limitation of the Portal or just BlueSky in general. Rather annoying and not much of a so called upgrade.