This update is a big one! Live audio preview has been added!!!

For Linux:

You can select which audio stream you want to visualize with Pavucontrol. Just set that source as fallback in the "Input Devices" tab.

• Set as fallback "Monitor" to visualize Desktop Audio.
• Set as fallback Internal Microphone or your audio interface for actual audio inputs.

For Windows:

• Search for "Sound settings"

• Advanced -> More sound settings

• For Desktop Audio, you can select which audio stream you want to visualize in the "Playback" tab by setting it as default.

• For live microphone input (or any other audio source like an audio interface), go to the "Recording" tab and double click on the device you want to use.

• In the "Listen" tab, check "Listen to this Device" and then press OK/Apply.