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README: update and add link
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@andrew-d
andrew-d committed Jun 13, 2022
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Expand Up @@ -4,8 +4,12 @@ This is a simple GTK tray icon to swap Bluetooth headset modes between the
`a2dp_sink` mode and `handsfree_head_unit` mode.

### Why?
A2DP has much higher audio quality, but doesn't support being used as a
microphone, while the `handsfree_head_unit` mode allows a headset to act as a
microphone but reduces audio quality. By clicking on the tray icon and then
selecting a headset, you can swap between these at will when listening to music
or using your headset for videoconferencing.

The A2DP Bluetooth profile has much higher audio quality, but doesn't support
being used as a microphone, while the HSP/HFP profile allows a headset to act
as a microphone but reduces audio quality. By clicking on the tray icon and
then selecting a headset, you can swap between these at will when listening to
music or using your headset for videoconferencing.

For more information, see Wikipedia:
https://en.wikipedia.org/wiki/List_of_Bluetooth_profiles

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