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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minutemmsys.cpl opens Windows’ classic Sound dialog, also known as Sound Properties or the Multimedia Properties Control Panel module. It is still available in Windows 11, even though Microsoft now places most audio controls in the Settings app.
Use this dialog when you need the older Playback, Recording, Sounds, or Communications tabs; endpoint properties such as microphone levels; or device-specific controls that are not visible in the modern Sound page.
What is mmsys.cpl?
mmsys.cpl is a Windows .cpl Control Panel applet. The mmsys name refers to Multimedia System settings, while the .cpl extension identifies a Control Panel module.
It is not an MMC snap-in. Therefore, mmc mmsys.cpl is the wrong command. MMC is designed for console files such as .msc; the Sound applet should be launched directly, with control, or through the Windows shell.
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When opened, the applet normally displays four tabs:
| Tab | What it controls |
|---|---|
| Playback | Output devices such as speakers, headphones, HDMI audio, and USB headsets. |
| Recording | Input devices such as microphones and line-in hardware. |
| Sounds | Sounds assigned to Windows events. |
| Communications | How Windows adjusts audio when it detects communications activity. |
Open the classic Sound Control Panel in Windows 11
Method 1: Use the Run command
This is usually the fastest and most reliable method:
- Press Windows key + R.
- Type
mmsys.cpl. - Select OK or press Enter.
The classic Sound dialog should open immediately.
Method 2: Use Windows Terminal, PowerShell, or Command Prompt
Open Windows Terminal, PowerShell, or Command Prompt and run:
mmsys.cplYou can also use the explicit Control Panel form:
control mmsys.cplMicrosoft also documents this legacy form:
control mmsys.cpl soundsThe sounds argument belongs to the older applet interface. It does not open Windows 11’s modern Settings > System > Sound > Volume mixer page.
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Method 3: Use Windows 11 Settings
- Open Settings.
- Select System.
- Select Sound.
- Scroll down and select More sound settings.
This opens the same classic Sound dialog in a separate window. The link is currently called More sound settings; instructions that call it Advanced sound options are referring to a different or older interface.
Method 4: Use Control Panel
- Open Control Panel.
- Set View by: to Large icons or Small icons.
- Select Sound.
In Category view, the Sound applet may be hidden inside a category or may not be immediately obvious. Switching to an icon view makes it easier to find.
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Method 5: Create a shortcut
Right-click an empty area of the desktop, choose New > Shortcut, and enter either of these locations:
mmsys.cplor:
%windir%System32mmsys.cplSelect Next, give the shortcut a name such as Classic Sound, and select Finish.
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Playback: manage output devices
The Playback tab lists audio rendering endpoints. Depending on the computer, these may include built-in speakers, wired headphones, HDMI or DisplayPort audio, Bluetooth headsets, and USB audio devices.
Select a device and choose Properties to view the pages provided for that device and its driver. Common controls may include levels, supported formats, enhancements, spatial sound, and endpoint information. The exact tabs are not identical on every PC.
Use the playback list when Windows is sending sound to the wrong output. Select the intended device and use the available option to make it the default playback device, if necessary.
Recording: adjust microphones and inputs
The Recording tab lists capture endpoints such as the built-in microphone, a headset microphone, a USB microphone, or a line-in input.
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To adjust a microphone’s level:
- Open the Recording tab.
- Select the microphone.
- Select Properties.
- Open the Levels tab.
- Adjust the microphone level and, where available, microphone boost.
- Select Apply, then OK.
If the microphone is missing entirely, changing its level here will not help. Windows must first detect and expose the device through its audio driver.
Sounds: change Windows event sounds
The Sounds tab assigns audio files to events such as notifications and system alerts.
- Open the Sounds tab.
- Under Program Events, select an event.
- Use the Sounds drop-down list to choose a sound.
- Select Test to preview it.
- Select Apply, then OK.
You can also choose a different sound scheme or disable sounds for a particular event by selecting the appropriate option in the sound list.
Communications: control automatic volume reduction
The Communications tab contains the classic behavior settings Windows uses when it detects communications activity. These settings are separate from Windows 11’s per-application controls in Volume mixer.
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Rename a playback device
You can give a playback endpoint a more useful name, such as Desk speakers or Monitor HDMI:
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- Open
mmsys.cpl. - Select the Playback tab.
- Select the device and choose Properties.
- Remain on the General tab.
- Edit the friendly-name text box.
- Select OK.
This changes the stored name for that audio endpoint. It does not rename every endpoint that uses the same underlying pin category. Also, software that queries the driver directly may continue to display the driver-supplied name instead.
mmsys.cpl versus Windows 11 Sound settings
| Task | Use |
|---|---|
| Choose a general output device | Settings > System > Sound |
| Open the old Playback and Recording tabs | mmsys.cpl or More sound settings |
| Change per-application volume and output routing | Settings > System > Sound > Volume mixer |
| Adjust a microphone’s classic level controls | Recording > Properties > Levels in mmsys.cpl |
| Assign sounds to Windows events | Sounds tab in mmsys.cpl |
In particular, mmsys.cpl does not open Volume mixer. For that modern destination, Windows supports the Settings URI ms-settings:apps-volume, which can be entered in the Run dialog.
Alternative launch syntax
Windows also supports the general Control Panel launcher syntax:
rundll32.exe shell32.dll,Control_RunDLL mmsys.cplThis is useful in scripts or shortcuts, although mmsys.cpl and control mmsys.cpl are simpler for normal use.
Common problems with mmsys.cpl
Search opens Sound settings instead
Windows Search often prioritizes the modern result labeled Sound settings or System settings. That is not necessarily the classic applet. Use More sound settings from the Sound page, or bypass Search with mmsys.cpl.
More sound settings does nothing
A temporary Settings-app problem can prevent the link from opening the dialog. Close and reopen Settings, then try again. Running mmsys.cpl from Run bypasses that navigation path.
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A device is missing
The applet only shows endpoints exposed by the Windows audio subsystem. A missing device may be disconnected, disabled, undetected, or unavailable because of a driver problem. Check the physical connection and the device’s driver before changing Sound Properties.
A tab or property page is missing
Device property pages are hardware- and driver-dependent. A USB headset, HDMI output, laptop microphone, and third-party audio device can expose different controls. The absence of a particular tab does not necessarily indicate a Windows error.
The applet is blocked
On a managed computer, an administrator may hide the Sound Control Panel item or restrict access to Settings. In that case, the command may fail or the applet may be inaccessible even when the file exists.
You typed mmc mmsys.cpl
Do not use:
mmc mmsys.cplUse one of these instead:
mmsys.cplcontrol mmsys.cplrundll32.exe shell32.dll,Control_RunDLL mmsys.cplFAQ
Is mmsys.cpl still available in Windows 11?
Yes. Windows 11 still includes the classic Sound dialog. Open it with mmsys.cpl, through Control Panel, or through Settings > System > Sound > More sound settings.
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No. It opens the classic Sound dialog. Windows 11’s per-application Volume mixer is a separate Settings page, available at ms-settings:apps-volume.
What is the correct command: mmsys.cpl or mmc mmsys.cpl?
Use mmsys.cpl. The file is a Control Panel applet, not an MMC console. mmc.exe is intended for MMC consoles and .msc files.
How do I change microphone volume with mmsys.cpl?
Open Recording, select the microphone, choose Properties, open Levels, adjust the level, and select Apply and OK.
Why is my headset not listed in mmsys.cpl?
Windows may not be detecting it, the device may be disabled or disconnected, or its driver may not be exposing an audio endpoint. Check the connection and driver. The applet can only list devices supplied by the Windows audio subsystem.
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mmsys.cpl remains the quickest route to Windows’ classic Sound Control Panel. Run it directly when you need the Playback, Recording, Sounds, or Communications tabs, detailed endpoint properties, or microphone level controls. Use Windows 11’s modern Sound settings instead for per-application volume and current device-routing controls.
