audiobluetooth
I am having a Bluetooth headset that supports AAC and aptX.
However, my macOS defaults to SBC codec that causes low-quality audio for music.
I know the trick how to force AAC / aptX with Bluetooth Utilities Xcode Additional Tools and I have done this.
Even after doing this and restarting the computer, I am still getting SBC as the codec as in the screenshot above.
What others settings I could poke to force the headset to play music nicely?
Are you still having this issue? I found this set of changes fixes the output, though I'm still having tinny input quality over bluetooth:
defaults write com.apple.BluetoothAudioAgent "Apple Bitpool Max (editable)" 120
defaults write com.apple.BluetoothAudioAgent "Apple Bitpool Min (editable)" 80
defaults write com.apple.BluetoothAudioAgent "Apple Initial Bitpool (editable)" 120
defaults write com.apple.BluetoothAudioAgent "Apple Initial Bitpool Min (editable)" 80
defaults write com.apple.BluetoothAudioAgent "Negotiated Bitpool" 100
defaults write com.apple.BluetoothAudioAgent "Negotiated Bitpool Max" 120
defaults write com.apple.BluetoothAudioAgent "Negotiated Bitpool Min" 80
defaults write com.apple.BluetoothAudioAgent "Stream - Flush Ring on Packet Drop (editable)" 30
defaults write com.apple.BluetoothAudioAgent "Stream - Max Outstanding Packets (editable)" 15
defaults write com.apple.BluetoothAudioAgent "Stream Resume Delay" 0.75
I was testing the theory today with a codec name error.
Indeed, aptX remained 100 %. Very similar to Bug with the name. I hope they correct in the future. Checked in Bluetooth Explorer. Ran using the check box in the SBC codec menu and aptX to check bitrate in one case or another.
It turned out when put in priority aptX the bitrate was exclusively 384 kb/s and it was not possible to change it by any software, which is possible only with this code. Then banned aptX and it turned out bitrate which is possible only in SBC 327 kb/s.
Plus it was possible to change bitpool, which immediately led to the fall of bitrate and sound quality.
Best Answer
Download Sony Headset app for your mobile (iOS or Android). They have settings to remotely configure the headphones.
Turn on the setting to prefer the sound quality: Priority on Sound Quality.
Now you get aptX: