[mrpippy]

iOS has supported AAC over Bluetooth A2DP for years. For some reason, it's not as widely supported by headphone makers as aptX.

[rasz]

Why would you support anything but your proprietary codec in your bluetooth controller chips? CSR didnt know either, was rewarded with handsome ($2.4B) Qualcomm buyout.

[mrpippy]

Having done development with CSR chips, AAC (and also MP3) support is shipped with the SDKs just like aptX is. AAC patent licensing may be more complex though.