由于macOS的可配置性,可以直接用命令修改AAC,aptX开关(新机器可能没有aptX),甚至SBC的比特率

defaults write com.apple.BluetoothAudioAgent "Apple Bitpool Max (editable)" 90
defaults write com.apple.BluetoothAudioAgent "Apple Bitpool Min (editable)" 80
defaults write com.apple.BluetoothAudioAgent "Apple Initial Bitpool (editable)" 88
defaults write com.apple.BluetoothAudioAgent "Apple Initial Bitpool Min (editable)" 80
defaults write com.apple.BluetoothAudioAgent "Negotiated Bitpool" 88
defaults write com.apple.BluetoothAudioAgent "Negotiated Bitpool Max" 90
defaults write com.apple.BluetoothAudioAgent "Negotiated Bitpool Min" 80
sudo defaults write bluetoothaudiod "Enable AptX codec" -bool true
sudo defaults write bluetoothaudiod "Enable AAC codec" -bool true
sudo defaults write bluetoothaudiod "Enable SBC codec" -bool true
sudo defaults write bluetoothaudiod "SBCBitpool" -int 88
sudo defaults write bluetoothaudiod "EnableJointStereo" -bool false
sudo pkill bluetoothaudiod
sudo pkill coreaudiod

然后手动关掉蓝牙再开就行,Bitpool最大值为255,但是经过测试,qcc3040只能支持到90,也就是529kbps,几十块便宜货是84,也就是496kbps,现在大部分耳机都支持Stereo模式,关闭能显著提升高频音质,当然了这比特率是很高的,如果环境信号较差,断断续续,甚至没声,请降低Min,或者实在不行降低SBCBitpool
这样操作可以让SBC达到甚至远超AAC的音质水准(主要看耳机的情况,SBC解码容易,码率能拉到很高)
MacBook2021信号好像比较拉,默认值90人动一下就会卡,测试88良好
最好弄完重启一下电脑,因为直接kill掉会影响罗技的软件正常工作