Microphone Not Working? How to Fix It
When your microphone is not working, run a quick check in Mic Test first. It tells you whether the problem is the mic itself or the app you're trying to use. Press "Test my microphone", allow access, and talk. If the meter moves and you get the green "Your microphone is working" message, the hardware is fine and the fault sits in one app's settings. If the meter doesn't move, go through the checklist below in order. The fixes run roughly from most to least likely, so start at the top.
Start with a sound and mic test
A 30-second audio test of your microphone splits the problem in half before you change any settings. Mic Test runs in your browser, and your audio never leaves your device. What it shows you:
- The input level meter. It should jump when you speak and fall back when you stop.
- The Device line. This is the microphone the browser actually opened, which isn't always the one you assumed.
- Error messages that point at the cause. "Microphone permission was blocked" means permissions. "No microphone was found" means the system can't see a device. "Could not open the microphone. Another app may be using it" means something else has hold of it.
- A 5-second sample. Press "Record a 5-second sample" and play it back to hear how you actually sound.
If you see "Connected, but no sound yet", the browser has opened a device but isn't getting any signal from it. That's nearly always a mute switch, an input level sitting at zero, or the wrong device, which are steps 1, 4 and 2 below. For the full walkthrough of the tool, see how to test your microphone.
The microphone troubleshooting checklist
1. Check for a hardware mute switch
Start here. It's a common cause and the quickest one to rule out. Plenty of headsets have a mute button on the cable or a flip-up boom that mutes when raised. USB mics often have a mute button that lights up red. Some laptops have a mic-mute key on the function row with a small LED. Gaming headsets sometimes mute from a dial on the earcup.
Toggle anything that looks like a mute control, then run the test again.
2. Make sure the right input device is selected
Your computer may know about several microphones at once: the laptop's built-in mic, a webcam mic, a headset, a USB mic, even a virtual device left behind by meeting software. Windows, macOS and each app all choose a default independently, and after you plug something in, they don't always pick the device you expect.
- Windows 11: Settings > System > Sound, then pick your mic under Input.
- macOS: System Settings > Sound > Input, then select your mic in the list.
- In the browser: if you have more than one input, Mic Test shows a "Switch microphone" dropdown under the meter. Choosing a device there restarts the test on that mic, which is a quick way to find out which one actually works.
3. Check that permission isn't blocked (OS and browser)
There are two permission layers, and either one can silently block your mic.
Operating system. On Windows 11, go to Settings > Privacy & security > Microphone. Make sure Microphone access is on, then Let apps access your microphone, and for programs like Discord or Zoom installed outside the Store, Let desktop apps access your microphone. On macOS, go to System Settings > Privacy & Security > Microphone and switch on the app you're using. Some apps need a restart before a new macOS permission takes effect.
Browser. Each site needs its own permission. If you once clicked Block, the browser remembers that and won't ask you again. Click the icon at the left of the address bar (Chrome and Edge show a site-settings icon, Firefox a permissions icon, Safari uses Settings for This Website), set Microphone to Allow, then reload the page. When the browser itself isn't allowed at the OS level, the site permission won't help. You'll need to fix the layer above first.
4. Check the input level isn't at zero
A mic can be selected, allowed and unmuted and still send near silence because its input volume has been turned all the way down. Driver updates and apps that auto-adjust the level can both leave it there.
- Windows 11: Settings > System > Sound, open your input device's properties, and check the Input volume slider. That page also has a Start test button.
- macOS: System Settings > Sound > Input, then drag the input volume slider up.
Aim for a level where normal speech lands well into the meter without pinning it, since a pinned meter means clipping. If your voice only just flickers the meter in Mic Test even at full input volume, the mic is probably too far away, or it's a low-output mic that needs an interface with more gain (see gain staging).
5. Check whether another app is holding the microphone
If Mic Test reports "Could not open the microphone. Another app may be using it", something else has taken the device, often a call app running in the background, recording software, or a second browser tab. Close it, or fully quit it from the system tray or menu bar, and try again. On Windows this can happen because apps are allowed to take exclusive control of an audio device.
6. Check cable, port and driver
Once settings are cleared, look at the physical side:
- Try another port. Plug USB mics straight into the computer instead of through a hub. On a desktop, try a rear port if a front-panel one gives trouble.
- Check the jack type. A headset with one 4-pole 3.5 mm plug needs a combo jack. Plugged into a mic-only or headphone-only socket, the mic usually won't register. A splitter fixes it.
- Reseat the cable. Unplug it, wait a few seconds, plug it back in. On XLR mics, check the cable and confirm the interface's gain is up. Condenser mics also need phantom power (48V) switched on.
- Update or reinstall the driver (Windows). In Device Manager, under Audio inputs and outputs, right-click the mic and update or uninstall the driver, then restart so Windows reinstalls it.
- Try another computer. If the mic is silent on two machines, the mic or its cable is the problem.
Microphone not working in Discord, Zoom or Teams
If the browser test passes but Discord, Zoom, Teams or a game still can't hear you, the mic is fine and the problem is in that app's settings. Every call app keeps its own input-device choice, and it doesn't always follow the system default.
Discord is the classic case. Open User Settings > Voice & Video and check three things:
- Input Device is set to your actual mic, not "Default" pointing somewhere else.
- Input Volume isn't pulled down.
- Input Mode. On Push to Talk, nobody hears you until you hold the key. On Voice Activity, an input sensitivity threshold set too high can cut your voice out.
The same screen has Discord's own mic test ("Let's Check"), which plays your voice back so you can confirm the fix. If the app still hears nothing, go back to step 3: desktop apps on Windows need Let desktop apps access your microphone, and on macOS the app has to be switched on under Privacy & Security > Microphone.
Zoom (Settings > Audio) and Teams (Settings > Devices) work the same way. Pick the mic by name instead of trusting the default.
When the mic works but sounds bad
Sometimes the mic picks you up fine but sounds thin, distant or noisy. That's a quality problem, and the fixes are different. Record a sample in Mic Test and listen back. The device panel also shows whether browser processing (echo cancellation, noise suppression, auto gain) is on, and that can make a voice sound slightly processed. For a recording that's already noisy, the Noise Reducer cleans up hiss and background hum, and how AI noise reduction works explains what it can and can't remove. To make a proper recording once everything works, see how to record audio in your browser or go straight to the Audio Recorder. More step-by-step guides are in the how-to section.
Frequently asked questions
Why is my microphone not working even though it's plugged in? Usually because it's muted, the system is using a different input device, or permission is blocked. Plugging a mic in doesn't make it the default. Select it under Settings > System > Sound on Windows or System Settings > Sound on macOS, then run a mic test to confirm.
How do I test sound and microphone at the same time? Open a mic test that plays back what it records. In Mic Test, speak to check the live input level, then press "Record a 5-second sample" and play it through your speakers or headphones. That tests the mic input and the audio output together.
Why does my mic work in a browser test but not in Discord? Discord has its own input-device setting that can point at a different mic than your system default. In User Settings > Voice & Video, set Input Device to your mic, check Input Volume, and make sure Input Mode isn't Push to Talk unless you meant to choose it.
What does 'Microphone permission was blocked' mean? Your browser has been told not to let that site use the mic, either because Block was clicked earlier or because the OS doesn't allow the browser mic access. Allow it from the icon at the left of the address bar, reload, and check your OS privacy settings if it still fails.
Is an online mic test safe to use? Mic Test analyses your microphone locally in your browser. Your audio never leaves your device, and the 5-second sample stays in the tab and is discarded when you leave. Press "Stop test" to release the microphone when you're done.
Why is my mic so quiet? The input volume is usually set low, or you're too far from the mic. Raise the input volume in your OS sound settings and in the app, and move closer. Quiet USB headsets often improve a lot once they sit a hand's width or less from your mouth instead of hanging at chin level.