I’m not quite certain if I’m spreading incorrect information as it’s been a long time since I’ve looked at the subject. I thought for a given bitrate AAC produc

I’m not quite certain if I’m spreading incorrect information as it’s been a long time since I’ve looked at the subject. I thought for a given bitrate AAC produced measurably better results than MP3. I wonder does the iOS Bluetooth audio stack transcode existing AAC audio to a lower bitrate or does it pass it through? You are right though, iOS devices don’t support anything other than AAC or SBC over Bluetooth. MacOS devices do seem to additionally support AptX, but none of the low latency or lossless variants. It wouldn’t surprise me to learn that Apple planned to roll their own AAC lossless codec given the movement of Spotify to lossless streaming, leaving Apple with no high tier offering.