Quick fix: Reset audio defaults via Terminal (Admin): net stop AudioEndpointBuilder && net stop Audiosrv, delete HKCU\Software\Microsoft\Windows\CurrentVersion\MMDevices\Audio, then net start AudioEndpointBuilder && net start Audiosrv. Reopen Sound → Playback. Audio devices appear with fresh defaults; you reconfigure preferences.

You’ve tweaked audio settings — different default formats, custom enhancements, app-specific levels — and now audio sounds wrong. Rather than uninstall/reinstall drivers (heavy), reset just the audio preferences. Drivers stay; settings revert to defaults.

Symptom: Audio configuration is wrong but driver works; want to reset settings without uninstalling/reinstalling driver.
Affects: Windows 11 (and Windows 10) audio subsystem.
Fix time: ~10 minutes.

What causes this

Windows stores audio settings in registry (per-device defaults, app volumes) and in driver-specific configs (Realtek Audio Console settings, Dolby Atmos profiles). Driver reinstall replaces both. Settings reset replaces only the registry portion, preserving the driver. Less invasive and often sufficient.

Method 1: Reset MMDevices registry key

The standard reset.

Open Terminal (Admin).

Stop Windows Audio services:

net stop AudioEndpointBuilder
net stop Audiosrv

Open Registry Editor.
Navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\MMDevices\Audio.
Right-click Audio key → Export. Save backup to Desktop as audio-backup.reg.
Right-click Audio → Delete. Confirm.
Repeat for HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio (system-wide).

Restart services in Terminal:

net start AudioEndpointBuilder
net start Audiosrv

Windows rebuilds Audio key. Open Sound → Playback. Devices appear with default settings. Reconfigure as needed.
To revert if something broke: double-click audio-backup.reg on Desktop → Yes to merge.

This resets per-user and per-system audio configs.

Method 2: Reset specific app audio configs

For one app misbehaving while others are fine.

Open Settings → System → Sound.
Scroll to Advanced → Volume mixer. Click.
Volume Mixer shows per-app volume and device routing.
Click the Reset button at the bottom (Reset sound devices and volumes for all apps to recommended defaults).
Confirms. All apps return to default device, 100% volume, default sound effects.
For individual apps: click app row, change device assignment back to Default.
For per-app spatial audio: Sound → Spatial sound → pick Off or your preferred mode globally; apps inherit.

This is the GUI reset, less invasive than registry.

Method 3: Reset Realtek Audio Console (or vendor) settings

For settings outside Windows’s audio stack.

Open Realtek Audio Console (or equivalent: Conexant SmartAudio, Dolby Access).
Find Reset to defaults button (varies by vendor). For Realtek: in main settings, often a Reset icon.
Confirm reset. EQ, Sound Effects, Bass Management all return to default.
For Dolby Atmos: open Dolby Access app → Settings → Reset audio profiles.
For Sonic Studio (Asus): app settings → Reset.
For Nahimic (MSI, etc.): right-click Nahimic in tray → About → Reset.
If vendor app missing: install from Microsoft Store. Realtek Audio Console is free.

This is the right path for vendor-specific audio settings.

How to verify the fix worked

Open Sound → Playback. Default device is correct. Default Format reset.
Play test audio. Sounds at default volume, no enhancements applied.
Per-app volumes in Volume Mixer all at 100% (or default).

If none of these work

If audio settings still wrong: Driver-side persistence: some driver versions store settings outside Windows registry. Re-install vendor driver to fully reset. For app-specific custom audio: some apps (DAWs, recording software) store config in their own files. Re-create profile in the app. For per-device hardware EQ: USB DACs or audio interfaces may have hardware EQ presets. Reset via vendor app or hardware button on device. For Bluetooth audio with paired-device settings: unpair and re-pair the device. Settings clear during re-pair. For corporate-managed PCs: Group Policy may enforce specific audio settings. Check policies. Last resort: driver reinstall: Device Manager → Sound, video and game controllers → right-click audio device → Uninstall device (tick “Delete driver”). Reboot. Windows reinstalls generic driver. Re-install vendor driver fresh. More invasive than registry reset but most thorough.

Bottom line: Delete HKCU\Software\Microsoft\Windows\CurrentVersion\MMDevices\Audio + restart Audio services. Or use Volume Mixer’s Reset button. Lighter than driver reinstall.