Looks good, been testing all weekend some interesting points.
Set up 1:
UGREEN Lightning to 3.5mm Headphone Jack Adapter MFi TRRS Aux Earphone Audio Mic Cable Compatible and the supplied usb c 3.5mm jack. Sound is stunning but the touch controls on the earphone no longer work. Transmission codec aptX LL
set up 2: apple cck with standard usb c cable, sound is stunning, transmission codex aptX, and touch controls still work.
set up 3: standard Bluetooth connection sound is still very good, better than all the other Bluetooth earphones I have tried including the sens, which I could not get to fit, transmission codec aac.
overall anc seems ok when music is playing and it does seem to change the range of the base sound more depth
Lastly I’m convinced the sound via retransmission is better then standard Bluetooth aac, not sure why, but the depth of low frequency’s is stunning. I wonder when using the cck to the case for transmission what is going on in the case and the compression rates in aptX are preserving something,
My sources are Amazon music hd and hf player onyko on iPhone 12 Pro Max