Microphone Test Shows Volume 0: Diagnose Missing Input

A microphone test that reports volume 0 means the test is getting no signal from the input device it is listening to. It may be listening to the wrong device, access may be blocked, the device may be muted or disabled, or there may be a hardware or driver fault. The steps below check each cause in order, starting with the quickest.

Before you start

• Identify the microphone you intend to use: built-in laptop or webcam mic, USB microphone, wired headset, or Bluetooth headset.
• Check physical mute controls, such as a switch on a headset cable, a mute button on the microphone, or a keyboard mute key with an indicator light.
• Close call, streaming and recording apps that may currently be using the microphone.
• Note your current sound settings before changing them, so you can restore anything that does not help.

Know where the test runs. The microphone test in Windows 11 Settings runs on your PC. A browser-based microphone test runs inside the browser. Whether a site sends any audio to a server depends on that site, so check its privacy information instead of assuming it stays local.

Step-by-step instructions

1. Allow microphone access

Open Settings > Privacy & security > Microphone. Turn on Microphone access and Let apps access your microphone. For browsers and other traditional programs, also turn on Let desktop apps access your microphone. If you test in a browser, check that the site has microphone permission. You can usually change this from the icon next to the address.

2. Select the correct input device

Open Settings > System > Sound. Under Input, choose the microphone you want to use. Device names come from the driver, so a headset may appear under the manufacturer's name or as a generic headset entry. A Bluetooth headset may show more than one entry; pick the one that matches the headset's microphone.

3. Check the input level and run the test

Select the device under Input to open its properties. Make sure audio is allowed for the device and the Input volume slider is not at zero. Next to Test your microphone, select Start test, speak at a normal level for a few seconds, then read the result. Wording and layout can differ slightly between Windows 11 versions.

4. Check the classic Sound panel

In Sound settings, open More sound settings and go to the Recording tab. Speak and watch the level bar next to each device; this shows which device actually receives your voice. If your microphone is missing, right-click an empty area and enable Show Disabled Devices, then enable it. Open the device's Properties. On the Levels tab, confirm the level is not zero and the speaker icon is not muted. Some drivers also offer Microphone Boost here. The Advanced tab shows the default format, including sample rate and bit depth, and the exclusive mode options. If you change these, note the original values first.

5. Restart or reinstall the driver

Open Device Manager and expand Audio inputs and outputs. If the microphone shows a warning icon or is disabled, enable it. You can also uninstall the device and restart the PC, which normally lets Windows reinstall it. If the manufacturer provides its own audio driver or control software, check whether it has a separate mute or input setting.

Check the output

The fix has worked when the test shows a level above zero while you speak and the Recording tab bar moves with your voice. A level meter alone does not prove the audio is usable. Record a short clip, for example with the Sound Recorder app, and play it back through your usual output device.

Listen for low volume, distortion and background noise. Raising Microphone Boost makes your voice louder, but it also raises background noise. If the sound is present but distorted, check the default format on the Advanced tab and the audio settings in the app you use.

Common problems and next steps

Windows 11 microphone test stays at 0

If the device is selected, allowed and unmuted but still reads zero, use the Recording tab to see whether a different device responds to your voice. If another device's bar moves, set that one as the default or select it in your app. If no bar moves, the problem is likely the connection, the driver or the hardware. Windows 11 also includes a recording audio troubleshooter in the Get Help app, which can be worth trying.

A browser or online test says volume 0

The browser may be using a different microphone from the Windows default. Check the browser's site settings for the selected input device and the permission state. Close other tabs or apps that may be using the microphone, then reload the test page. If access was denied once, the browser can keep blocking the site until you change the permission.

The microphone works in one app but not another

Many call and recording apps have their own input device setting that ignores the Windows default. Select the correct microphone inside the app. If another program may have taken exclusive control of the device, close it and test again.

Headset and connection issues

• A headset with one combined plug may not pass microphone audio on a computer with separate microphone and headphone jacks. These setups typically need a splitter adapter.
• Try another USB port, preferably one directly on the computer rather than a hub.
• For Bluetooth headsets, remove and pair the headset again, then reselect its microphone entry as the input device.
• Test the microphone on another device to tell a hardware fault from a settings problem on this PC.

If the microphone reads zero on every device you try, the microphone, cable or headset is the likely cause. Check the manufacturer's support information or warranty options.