Quote:
Originally Posted by Fiffy
What does the video codec have to do with audio quality? 
I would disagree with the notion that iTunes audio is lacking. The Atmos tracks sound excellent. It would be good if they could upgrade the bitrate of non-Atmos tracks though (640kbps DD+ would be enough, currently they use 384 kbps for 5.1 tracks which is DVD quality). |
384 Kpbs on iTunes is DD+ eAc3. It's a compressed version of lossy DD+ @ 640 Kbps.
Some films like Arrival and Revenant are 640 Kbps DD+. Vast majority are either Atmos @768 Kbps or DD eAc3 at 384 Kbps.
My guess on why the audio bit rates are in this range is due to ARC limitation of 1 Mbps for audio.
Once eARC becomes a norm, these Studios and streamers can start upping the audio bit rates but doubt if they would do that as I expect things to go in the opposite direction like what Netflix are planning to do.