3 ms·
Just remember that depending in the bluetooth features the sender and receiver each support, you may end up with horribly compressed audio. Apple devices will
by 0x008 6y ago
Just remember that depending in the bluetooth features the sender and receiver each support, you may end up with horribly compressed audio.
Apple devices will always use AAC codec if I remember which is is not only compressed, but will also try to compress with lower bitrates than say a regular mp3 cbr compression by judging which parts of the audio signal can be compressed more heavily according to what we should be able to hear. I think apple devices do not support lossless bluetooth.
Android devices were known in the past to use a bitrate that is dependant on the amount of processing power the encoder gets assigned from the system. This means that on some phones with power management that is not designed with encoding for bluetooth in mind you would end up with horribly low bitrates because the power management would take away processing resources from the encoder to save battery. This of course would not apply to lossless codecs, if the sender and receiver support them both and the software picks it up correctly.
- Tsiklon 6y agoI’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.
- deleted 6y ago[deleted]
- chimen 6y agoYes iOS devices use AAC but a better implementation so it's not that bad.