Thankfully, Windows 10 comes with an easy solution.

Open up the Sound Control Panel again, go to the “Recording” tab, and select “Properties”.

In the “Listen” tab is a checkbox called “Listen to this device”.

When you check it, you can now choose your speakers or headphones and listen to all the audio as you record it.

How do I record sound from my desktop?

Click on the speaker icon in your menu bar and select Loopback Audio as the output device. Then, in Audacity, click the drop-down box next to the microphone icon and select Loopback Audio. When you click the Record button, Audacity will start recording the audio coming from your system.

How do I record sound on my computer with audacity?

In Audacity, choose the “Windows WASAPI” audio host, and then choose an appropriate loopback device, such as “Speakers (loopback)” or “Headphones (loopback).” Click the Record button to start recording the audio in Audacity, and then click Stop when you’re done.