If I insert a new audio device it shows up under the Hardware Tab of Sound Settings:

However, I don't see it as an option in Input or Output Tab:

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Discovered a workaround. If I open up a terminal and run Clearly not a solution or an ideal workaround. |
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Try to change Profile for your device under the Hardware Tab of Sound Settings. For Plantronics it mast be "Analog Output + Mono Input" instead of "Analog Stereo Duplex" |
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