Option 2: Audacity’s WASAPI Loopback. Don’t have a Stereo Mix option? Audacity has a useful feature that can record the audio coming out of your computer—even without Stereo Mix. In fact, Audacity’s feature may be even better than Stereo Mix, assuming you’re willing to use Audacity to record the audio. If you are having trouble getting sound into Audacity there's lots of help available. For Windows see Windows: accessing the Windows Sound controls. To locate the system mixer for Mac and Linux see the help on our Wiki for Mac or Linux. Links Forward to: Tutorial - Audacity Settings for Recording.
Recording
Audacity can record live audio through a microphone or mixer, or digitize recordings from other media.
Export / Import
System Mixer Audacity
Import, edit, and combine sound files. Export your recordings in many different file formats, including multiple files at once.
Sound Quality
Supports 16-bit, 24-bit and 32-bit. Sample rates and formats are converted using high-quality resampling and dithering.
Plug-ins
Audacity System Mixer Reviews
Support for LADSPA, LV2, Nyquist, VST and Audio Unit effect plug-ins. Effects can be easily modified in a text editor – or you can even write your own plug-in.
Editing
Easy editing with Cut, Copy, Paste and Delete. Also unlimited sequential Undo (and Redo) in the session to go back any number of steps.
Audacity Music Mixer
Effects
Real-time preview of LADSPA, LV2, VST and Audio Unit (macOS) effects. Plug-in Manager handles plug-in installation and addition/removal of effects and generators from the menus.
Accessibility
Tracks and selections can be fully manipulated using the keyboard. Large range of keyboard shortcuts.
Analysis
Audacity Mixer Board
Spectrogram view mode for visualizing and selecting frequencies. Plot Spectrum window for detailed frequency analysis. Safari 12 plugins. Support for Vamp analysis plug-ins.
System Mixer For Audacity
For more information on these features, see the Audacity Manual.