Recording desktop audio
Audacity can record computer audio (including sound from YouTube, Spotify and more).
1. Select the loopback device
Click on Audio Setup and ensure Windows WASAPI is set as the Host.

Select the output you want to use (the device you're using to listen) as the recording device. It will be marked with a (loopback) after it's name.

2. Check if everything is set up correctly
Recording the desktop audio will record all desktop audio, including notification-pings, games, and Audacity itself (for example, other tracks in the timeline if you're using overdub). So unless you specifically want these noises, make sure to turn them off.
DON'T use input monitoring when recording desktop audio. Make sure it's off.
3. Record
Hit play to ensure audio is playing and then the record button to record your desktop audio.
Ensure audio is playing first when recording desktop audio as although WASAPI can record a silent audio stream it can’t record when there’s no audio stream.
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