Using the optical port? sounds interesting
btw any idea why wireless headphones use bluetooth instead of a more advanced protocol like wifi or even something proprietary designed for audio would be nice
Tx Power efficiency and typical usage, and simple power efficient circuits that intel accelerated in CPUs (IIRC from Intel Centrino launch).
Bluetooth operates in the unlicensed frequencies(same as 802.11A iirc) with lower data-rate, but with higher range – assuming same Tx power for b,g,n, ac - so that allows for even less tx power if wanting to reduce the range to about 5-10m. People 20m or a wall or ceiling away can then reuse the range for their bluetooth without fear of excessive interference. Giving lots of reuse in small areas – hence the PAN personal area network term that came into usage with bluetooth. As they’ve increased the versions of Bluetooth, smaller lithographies have allowed better encoding at same power, hence increased data rates within the same frequencies (AFAIK).
LDAC was proprietary to begin with, but Sony sensibly donated the source code for the codec to Android 7 to increase usage on all handsets to sell more high-end headphones to all smartphone buyers – not sure about iPhone.
To be fair, Hi-res audio upscaling is so effective with 128bit mp3 that just a chip to supplement low latency game codec (aptx?) would still be good for the DualSense using quality wired phones.