Fix electrical buzzing, ground loop noise, and interference hum in your recordings with AI-powered buzz removal.
Remove Buzzing NowThere's a particular kind of audio problem that drives people absolutely crazy: buzzing. Not a gentle hum — a harsh, grating buzz that sits on top of your recording like an angry wasp trapped behind the speaker. It's the sound of electrical interference, and once it's in your recording, it's all you can hear. You might have a perfectly good interview, a solid podcast take, or a great lecture capture, but that persistent buzzing makes the whole thing feel broken.
Buzzing in audio recordings almost always has an electrical origin. Here are the main culprits:
Ground loops happen when two pieces of equipment are plugged into different electrical outlets that have slightly different ground potentials. This creates a tiny current flow through the audio cable's ground wire, which shows up as a persistent 50 Hz (Europe/Asia) or 60 Hz (North America) buzz with strong harmonics at 100, 120, 150, 180 Hz, and so on up the spectrum.
The classic ground loop scenario: your microphone connects to an audio interface, which connects via USB to your laptop, which is plugged into a wall outlet. Meanwhile, the audio interface has its own power supply plugged into a different outlet. Different ground potentials, current through the ground wire, buzz in your recording. It's infuriating because the setup looks perfectly fine — everything is connected correctly, the levels look right, and you don't hear the buzz through your headphones until you play back the recording.
Fluorescent lights operate with a ballast that oscillates at mains frequency (50/60 Hz). Older magnetic ballasts produce an audible hum and radiate electromagnetic interference that audio cables pick up. Even modern electronic ballasts can create interference, especially in close proximity to unshielded cables. The buzzing from fluorescent lights has a distinctive "angry" quality — more aggressive and harmonically rich than a clean sine wave hum.
You've heard this one: that rapid "dit-dit-dit-dit-BZZZT" that happens when a cell phone communicates with a tower near unshielded audio cables. GSM phones are the worst offenders, but even 4G/5G devices can create interference in susceptible setups. The buzz is intermittent and correlated with the phone's data activity — it might appear suddenly during a recording when your phone checks for notifications or receives a message.
Many dimmer switches use phase-cutting circuits that introduce electrical noise into the power line. This noise travels through power cables and can be picked up by nearby audio equipment. Cheap LED drivers do something similar. The resulting buzz is often at harmonics of the mains frequency but with an irregular, "dirty" quality that makes it particularly unpleasant.
Audio cables with inadequate shielding act as antennas, picking up electromagnetic radiation from any nearby source: monitors, power supplies, wireless routers, transformers, and other electronics. The resulting noise depends on what's being picked up — it might be a steady buzz, an intermittent crackle, or a whine that correlates with computer activity.
Buzzing is fundamentally a tonal problem — it consists of a fundamental frequency (almost always 50 or 60 Hz) and a series of harmonics that extend into the kilohertz range. Traditional approaches use notch filters at each harmonic frequency. The problem? That can mean setting notch filters at 60, 120, 180, 240, 300, 360, 420, 480, 540, and 600 Hz (and beyond). Each notch also removes a bit of the speech content at that frequency, and with 10+ notches, the voice starts sounding thin and robotic.
Our AI takes a smarter approach to remove buzzing from video audio. The neural network identifies the complete harmonic structure of the buzz — the fundamental and all its overtones — as a single coherent interference pattern. It then suppresses the entire pattern together while using its understanding of speech to preserve vocal content at those same frequencies. The AI knows what speech is supposed to sound like at 120 Hz, at 240 Hz, at every frequency where the buzz harmonics live. So it removes the buzz contribution while keeping the speech contribution.
This is a much cleaner result than stacking notch filters. Voices sound full and natural. The buzz is gone — not just reduced, but gone. And because the AI processes the entire frequency range simultaneously, it handles even the higher harmonics that manual approaches often miss.
Whether your buzzing comes from a ground loop, fluorescent lights, phone interference, or a dimmer switch, the tool handles it. The AI doesn't need you to identify the source — it detects the harmonic pattern automatically and removes it. Here's how it performs on each type:
People often use "buzz" and "hum" interchangeably, and for practical purposes they're closely related. Technically, "hum" refers to a cleaner, more pure-tone sound (primarily the fundamental at 50/60 Hz), while "buzz" implies a more complex, harmonically rich sound with lots of overtones. Buzz tends to sound harsher and more grating than hum. But they share the same root cause (mains frequency interference) and the same solution. Whether you call your problem a hum or a buzz, the AI removes it.
While AI removal works great after the fact, here are ways to prevent buzzing in future recordings:
Ready to remove buzzing from video audio? Upload your video to our noise removal tool and the AI will analyze the audio track, identify the buzzing pattern (whatever the source), and produce a clean version. Processing typically takes 1–3 minutes for recordings up to 10 minutes in length. The video portion remains completely untouched — same resolution, frame rate, and visual quality. If the recording also has echo, white noise, or other issues, the AI addresses all of them simultaneously.
Ground loops are the #1 cause of buzzing. Using a single power strip for all your recording equipment eliminates the ground potential differences that create buzz.
Balanced cables cancel out electromagnetic interference that unbalanced 3.5mm and RCA cables pick up. Switching to XLR connections often eliminates buzzing entirely.
Cell phone GSM/4G interference near audio cables creates that distinctive "dit-dit-dit" buzzing. Airplane mode or moving the phone 3+ feet from your cables prevents it.
Fix electrical buzzing, ground loop noise, and interference hum in your recordings with AI-powered buzz removal.
Remove Buzzing Now