I would really like some clarification on this, too. A full list of supported codecs is missing from the Specifications.

@AshR0409 looks like the answer is no, according the SoundGuys review. They’re limited to SBC or AAC unless you have one of the vanishingly small number of phones that support AptX lossless - no adaptive support either, by the look of things. Very disappointing.

@iainholmes81 Just got them - they do support AptX HD on my Pixel, and so I would expect they support AptX and AptX Adaptive based on your device) as well.

Mine is on the way and I have Pixel 8 so I hope I'd get AptX HD too. At first, I thought Ace only supports AptX because of their website wording on thr support page lol.