How to Clean Up Background Noise in CapCut With AI

Bad audio loses viewers faster than bad video. CapCut's noise reduction analyzes a clip and suppresses constant background sound like fans, traffic, and air conditioning, while a separate voice enhancer lifts the spoken track. Together they rescue footage recorded in less-than-ideal rooms.

What you need

• CapCut desktop or mobile, signed in
• A clip with noticeable background noise under the speech
• Headphones, so you can actually hear what you are fixing

Step 1: Select the audio source

Click the clip whose audio you want to clean. If the audio is a separate file, select that track instead. Open the Audio tab in the properties panel.

Step 2: Turn on noise reduction

Toggle Reduce noise on. CapCut processes the clip and the constant hiss or hum drops away. Some versions expose a strength slider; leave it on Auto first and only raise it if noise remains.

Step 3: Add voice enhancement

Enable Voice enhance to make the dialogue clearer and more present. This is most useful when the speaker was far from the mic. Listen for a hollow or robotic quality, which means the effect is working too hard.

Step 4: A or B test the result

Toggle the effects off and on while listening on headphones. Noise reduction can introduce a watery artifact if pushed; if you hear it, lower the strength until the speech sounds natural again.

Result: a clip recorded next to a buzzing laptop fan now has clear, forward dialogue with the fan reduced to near silence.