What Is Microphone Clipping? Causes, How It Sounds, and How to Fix It

Microphone clipping is one of the most common causes of distorted, harsh audio on video calls and recordings — and one of the easiest to fix once you know what it is.

What Is Microphone Clipping?

Microphone clipping occurs when your input signal exceeds the maximum level your audio system can process, causing the peaks of the sound wave to be cut off (clipped) rather than recorded accurately. The result is a harsh, crackling, or distorted sound that makes your voice unpleasant to listen to.

The term "clipping" comes from the visual appearance of the audio waveform: instead of smooth peaks, the tops are literally clipped flat because the signal cannot go any higher.

What Does Clipping Sound Like?

Clipped audio sounds like:

• Harsh crackling or distortion on loud syllables
• A buzzing or "blown speaker" quality to your voice
• Sudden crunching sounds when you raise your voice
• Normal speech suddenly becoming distorted

Other participants on a call will notice clipping as "your mic is really harsh" or "you sound like you're on a bad phone call."

What Causes Microphone Clipping?

1. Gain set too high

The most common cause. Your microphone gain (input volume) is amplifying the signal beyond the system's maximum. Reducing gain by 10–20% usually fixes it.

2. Microphone Boost enabled

Windows has a "Microphone Boost" setting that adds +10 to +30 dB of gain on top of the normal input volume. If enabled, it almost always causes clipping. Disable it.

3. Speaking too close to the microphone

Loud close-range speech creates very high peak levels. Move 15–30 cm away from the mic or speak at a lower volume.

4. Loud sudden sounds

Plosive consonants (P, B, T) produce bursts of air that peak very high. A pop filter reduces these.

5. Software gain processing

Some conferencing apps (Zoom, Teams, Discord) apply automatic gain control that can boost your signal too high. Disable "Automatic gain control" in the app's audio settings.

How to Detect Clipping with a Level Meter

The clearest way to check for clipping is to use a real-time microphone level meter:

1. Go to miccheckonline.com/mic-test and click Start
2. Speak at your normal call volume
3. Watch the level meter — if it consistently hits 90–100% (the red zone), your mic is clipping
4. The ideal range is 40–80% (green zone) when speaking normally

How to Fix Microphone Clipping

On Windows

1. Right-click the speaker icon in the taskbar → Sound settings
2. Under Input, click your microphone → Device properties
3. Reduce the Input volume slider to 70–80%
4. Click Additional device properties → Levels
5. Set Microphone Boost to 0 dB (disable it)
6. Re-test with the level meter — aim for 40–80% while speaking

On Mac

1. Open System Settings → Sound → Input
2. Select your microphone
3. Reduce the Input volume slider until speech peaks at around 70%
4. Re-test

In Zoom

1. Open Zoom Settings → Audio
2. Uncheck Automatically adjust microphone volume
3. Manually set the input level so the test meter shows green, not red

In Discord

1. Discord Settings → Voice & Video
2. Disable Automatic Gain Control
3. Reduce Input Volume manually

How to Prevent Future Clipping

• Do a mic test before every important call or recording session
• If your mic has a physical gain knob, start at 50% and adjust up
• Keep your mouth 15–30 cm from the mic during calls
• Disable microphone boost on Windows permanently
• Run a quick level check at miccheckonline.com/mic-test before going live