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4.7   Improve sound quality by disabling audio input from device

Devices such as AirPods have both speakers and microphones; they can be used for both audio output and audio input. With such devices, macOS will normally use the SCO Bluetooth audio codec because this works with both output and input. It is a good choice if you are making a Skype call where you want to both listen and speak.

However, sometimes you may want to only listen, e.g. if you are playing music, watching a video, or playing a game. In this case, the SCO codec is not optimal because it has lower audio quality. A codec such AAC would provide better sounding audio. If you check the Improve sound quality by disabling audio input from device box, ToothFairy will ensure that macOS uses the higher quality codec, which is optimized for audio output.

It is still possible to do things that require audio input, e.g. starting a Skype call or talking to Siri. macOS will automatically switch back to the lower quality SCO codec when you use the microphone. You can tell ToothFairy to disconnect and reconnect the device if you’re done using the microphone and want to switch it back to the high-quality AAC codec.

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