Step one: check the currently configured and detected audio devices
https://filestore.community.support.microsoft.com/api/images/81afd1f3-4942-440f-80ad-21cdc09ab4fc?upload=true
#No Stereo Mix
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Example shown in the linked graphics.
Results vary depending on computer configuration
Step two: Find any possible unconfigured but detected audio devices
https://images.drivereasy.com/wp-content/uploads/2018/01/img_5a6c06dcb8671.jpg