Here is some technical info I was sent...
Not only did Netflix increase the bit rate of all audio streams from 192Kbps up to 640Kbps...
But also brought its
adaptive video streaming process to audio streaming. That’s a machine learning algorithm that analyzes your connection to adapt video streaming in real time. The same will now happen with your audio experience. The better your internet connection, the better the sound...
Which basically means is that you’ll need an extra 10Mbps to handle the “high-quality audio.” In other words, you won’t need to upgrade your internet connection to get better sound on all Netflix shows, as long as U meet their minimum speed requirements... NetFlix further advised the sound is optimized for AV receivers, streaming boxes, speakers, and soundbars that can support Dolby 5.1, Dolby Digital, Dolby Digital + and Dolby Atmos. If your equipment doesn’t meet those standards, then you won’t take advantage for the audio upgrade.
Just my $0.02..