How to Turn On Mono Audio and Spatial Sound in Windows 11
You want to hear all your audio in a single earbud, or get a wider, more immersive sound from headphones in Windows 11.
Why: Windows has two separate tools for this — Mono audio (an accessibility setting that merges left and right into one channel) and spatial sound (which virtualizes a surround soundstage over headphones). They live in different places.
Fix 1: Turn on Mono audio
Mono audio converts stereo into a single channel, so you hear everything even if you’re using just one headphone:
- Click the Start button, then go to Settings → Accessibility → Audio.
- Switch on the Mono audio toggle.
That’s it — both channels now play through whichever side you’re using. Switch it back off when you want normal stereo.
Fix 2: Turn on spatial sound (Windows Sonic for Headphones)
For a more immersive headphone soundstage:
- Go to Start → Settings → System → Sound.
- Under Output, select your headphones, then open Device Properties.
- Under Spatial sound, choose Windows Sonic for Headphones (and Apply if prompted).
Windows Sonic for Headphones is built in and free. For other formats, you can download Dolby Access or DTS Sound Unbound from the Microsoft Store and select them in the same Spatial sound list.
FAQ
Should I use Mono audio or spatial sound? They’re for different goals. Mono is an accessibility aid that puts everything in one channel; spatial sound widens the stereo image for immersion. Don’t expect spatial sound to do much if Mono audio is also on.
Spatial sound makes things sound worse. It’s a virtualized effect and not to everyone’s taste — set Spatial sound back to Off to return to plain stereo.
Sources: Microsoft Support — Make Windows easier to hear · Microsoft Support — How to turn on spatial sound in Windows