What buffer size should I use to stop crackling?

Raise the buffer until the crackle stops. 128 samples is a common tracking sweet spot on a healthy system; 256 is safer for heavier sessions. For mixing, where latency doesn't matter, use 512 or 1024. There's no benefit to running the smallest possible buffer — track at the lowest clean setting, then raise it for mixdown. If 256 is clean but feels laggy while performing, use your interface's direct monitoring instead of shrinking the buffer.

Why does my audio interface crackle over USB?

USB audio is a real-time stream with no opportunity to retry a chunk that arrives late, so anything that interrupts the link surfaces immediately as static or a dropout. The problem is usually contention or power rather than the interface itself. Give the interface a port of its own, straight into the machine, and take hubs, docks, and monitor passthroughs out of the path while you test. If the noise coincides with other USB devices getting busy — a wireless dongle, an external drive — you're looking at controller contention. And if a bus-powered interface disconnects as well as crackles, that's a power complaint, not a data one.

How do I know if crackling is clipping or a computer problem?

Ignore whether the noise is in the file — a computer hiccup during tracking gets recorded too. Judge by level instead. If the crackle appears only on the loudest moments and the waveform shows flat-topped peaks there, it's clipping: turn the input gain down so peaks land around −12 to −6 dBFS. If it appears at random spots regardless of how loud the performance is, worsens as the session grows, or shows up while playing back previously clean audio, it's a buffer, driver, or CPU problem.

Why did my recordings start crackling after a system update?

Operating system updates frequently break or replace audio drivers, and a previously stable setup can start crackling immediately afterward. Download the current driver directly from your interface manufacturer's website and reinstall it, then reselect the ASIO device in your DAW's audio settings on Windows. Also recheck your sample rate settings — updates sometimes reset the operating system's audio device configuration to a rate that no longer matches your DAW session.

Can a sample rate mismatch cause pops and clicks?

Yes, though two different faults share the name. A software mismatch — session, operating system, and interface panel set to different rates — forces something in the chain to sample-rate-convert on the fly, and that conversion is where ticks and intermittent crackle come from; the cure is to pick 44.1 kHz or 48 kHz and set it in all three places. A clock mismatch is separate: two digital boxes linked over ADAT or S/PDIF can both be set to 48 kHz and still click, because their crystals never run at exactly the same speed and the slave device drifts until it drops a sample. That one is fixed by nominating a clock master, not by changing a number.

Why does my recording crackle only on one input?

Crackle that follows a single input, or changes when you move cables, points to a physical fault rather than the computer. Gently flex each cable at both connectors while monitoring quietly — noise on movement means a failing cable or dirty jack. Swap one variable at a time: cable, then input, then mic or instrument. Scratchy guitar pots, failing output jacks, and worn XLR connectors are classic culprits that get wrongly blamed on the interface.

// Recording

Audio Crackling When Recording? 7 Fixes That Work

A HomeRecordingPro guide · Updated 2026-08-05 · 10 min read

Quick answerAudio crackling when recording is usually caused by the computer failing to process audio data in time — fix it by raising your buffer size (128 samples is the usual tracking sweet spot; step up to 256 if the session is heavy), matching the sample rate across your DAW, operating system, and interface, and installing the manufacturer's ASIO driver. A hiccup during tracking gets written into the file, so crackle you can see in the waveform still points here. Suspect clipping only when the noise lands on the loudest peaks, and cables or connections when it follows one input. USB hubs, weak ports, and aggressive laptop power saving are also common culprits.

Contents

Why Audio Crackles When Recording (The Short Answer)
Fix 1: Raise Your Buffer Size
Fix 2: Match Your Sample Rates Everywhere
Fix 3: Fix the USB Connection
Fix 4: Sort Out Your Drivers
Fix 5: Stop the CPU Interruptions
Fix 6: Check Your Gain — Clipping Sounds Like Crackle
Fix 7: Hunt Down the Physical Culprit
Quick Reference: Symptom to Fix
When Nothing Works

Why Audio Crackles When Recording (The Short Answer)

Audio crackling when recording almost always comes from one of two places: the computer can't deliver audio data on time, or something in the signal chain is physically or electrically misbehaving. The first category — buffer underruns, sample rate mismatches, driver problems, CPU spikes — produces the classic digital pops and clicks. The second — bad cables, failing USB connections, clipped gain — produces crackle with a physical or electrical cause.

The good news: this is one of the most fixable problems in home recording. The fixes below are ordered from most likely to least likely. Work down the list in order and stop when the noise stops.

One warning before you start, because it's the mistake that costs people the most time. A lot of troubleshooting advice tells you to check whether the crackle is "in the file" or "only in playback," and treats anything recorded into the file as a gain or hardware problem. That test doesn't work. If the computer hiccups while you are tracking — a buffer underrun, a CPU spike — the dropout is written permanently into the recorded audio. It shows up in the waveform, it plays back identically every time, and it is still a computer problem, fixed by raising your buffer (Fix 1) and calming the CPU (Fix 5).

What actually separates the causes is where the noise lands:

Only on the loudest moments, with flat-topped peaks in the waveform → clipping. Fix 6.
Following one input, one cable, or changing when you move things → physical fault. Fix 7.
At random spots regardless of level, or worsening as the session grows → the computer isn't keeping up. Fixes 1 and 5, whether or not the noise is baked into the file.
Live in your monitoring but clean in the file → also the computer. Fixes 1–5.

If one of those describes your symptom exactly, you can start at that fix. Otherwise just work down the list.

Fix 1: Raise Your Buffer Size

This is the single most common cause of crackling, and the fastest fix.

Your audio interface streams audio to the computer in small chunks, held in a buffer. If the computer doesn't process a chunk before the next one arrives, you get a gap in the stream — a buffer underrun — which you hear as a click, pop, or crackle. Small buffers give you low latency but leave the computer almost no margin. Large buffers give the computer breathing room at the cost of a longer delay between input and output.

In your DAW's audio settings (or your interface's control panel), find the buffer size setting and step it up:

32–64 samples: very low latency, high crackle risk on most systems
128 samples: the common tracking sweet spot on a healthy system
256 samples: a safer tracking setting if your session is heavy
512–1024 samples: for mixing, when latency no longer matters

If crackling disappears at 256 but you can feel the delay while performing, that's a separate tuning problem with its own solutions — direct monitoring being the big one. Our guide to fixing recording latency covers how to get both a clean stream and a playable feel.

A useful habit: track at the smallest buffer that stays clean, then raise the buffer for mixing. There's no prize for mixing at 64 samples.

Fix 2: Match Your Sample Rates Everywhere

A sample rate mismatch is the sneakiest cause of periodic clicking — and two genuinely different problems hide under that one label. They sound similar, so it's worth knowing which one you have.

Problem one: software and interface disagree. Your DAW session is at 44.1 kHz, your operating system's sound settings for the interface say 48 kHz, and the interface's own panel is set to one or the other. Under an exclusive-mode ASIO driver the DAW takes the device outright, so the usual symptom is a rate-mismatch warning, a session that won't open the device, or a DAW that quietly resets the hardware rate mid-session. When audio is instead going through a shared system mixer path — system sounds, a browser, a video call sharing the interface — the operating system has to sample-rate-convert on the fly, and that conversion is where ticks, glitches, and thin intermittent crackle come from.

Check all three places and make them agree:

The DAW session — the sample rate the project was created at
The operating system — the sound settings for your interface (on Windows this lives in the Sound control panel's device properties; on macOS in Audio MIDI Setup)
The interface's own control panel, if it has one

Pick one rate — 44.1 kHz or 48 kHz are both fine for home recording — and set it everywhere. If you're unsure which to choose, or what these numbers actually mean for quality, our sample rate and bit depth guide settles it: consistency matters far more than the number itself.

Problem two: two digital devices, two clocks. This is not a settings mismatch, it's a timing one. If you connect gear over ADAT or S/PDIF, both boxes may be nominally set to 48 kHz and still fail, because no two crystals run at exactly the same speed. Without a shared clock the slave device slowly drifts against the master and periodically has to drop or repeat a sample — which you hear as a click every few seconds, maddeningly regular. The fix isn't the rate setting; it's designating one device as clock master and setting every other device to slave to that incoming digital signal.

Fix 3: Fix the USB Connection

USB problems produce some of the ugliest crackle — harsh static bursts, dropouts, or an interface that vanishes mid-take. Work through these:

Change ports. Plug the interface directly into a port on the computer itself, not a hub, keyboard passthrough, or monitor. If you're on a desktop, prefer a rear-panel port wired straight to the motherboard.
Ditch the hub. Unpowered hubs are a frequent culprit; even powered hubs can misbehave with audio. Test with the interface as the only thing on that port.
Swap the cable. USB cables fail more often than people expect, and long or cheap cables are marginal for sustained audio streaming. Try a short, known-good cable before blaming anything else.
Isolate noisy neighbors. Some devices sharing a USB controller — wireless dongles especially — can interfere with audio streaming. Unplug nonessentials and test.

If your interface is bus-powered and the crackle comes with flickering power or random disconnects, the port may not be delivering stable power. A different port, or a powered interface, often ends the mystery.

Fix 4: Sort Out Your Drivers

On Windows, the driver is half the story. If you're recording through a generic Windows driver instead of the manufacturer's own ASIO driver, you're leaving both stability and latency on the table. Download the current driver from the interface manufacturer's website — not from a driver-updater utility — install it, and select the ASIO device in your DAW's audio settings.

Two more driver notes:

After OS updates, reinstall or update the audio driver. Major system updates are a classic trigger for new crackling on a previously stable machine.
On macOS, most interfaces are class-compliant and need no driver, so persistent crackling on a Mac points more strongly at sample rate mismatches, USB, or CPU load than at driver problems.

If your interface is an older model whose drivers are no longer maintained, and every fix on this list only tames the problem temporarily, it may genuinely be time to replace it. Here's what actually matters in a first audio interface if you go that route — stable drivers rank far above preamp marketing.

Fix 5: Stop the CPU Interruptions

A buffer only protects you if the computer services it on time. Anything that stalls the CPU for a few milliseconds — background tasks, aggressive power saving, a misbehaving system driver — can punch a click into an otherwise healthy stream. And if it happens while the transport is rolling, that click lands in the recorded file.

The usual suspects, roughly in order:

Power management. On Windows laptops, set the power plan to high performance while recording; CPU throttling to save battery is a crackle machine. On any laptop, record plugged in.
Wi-Fi and Bluetooth. Poorly behaved wireless drivers are a notorious source of periodic audio dropouts on Windows. Try disabling both for one take — if the crackle stops, you've found it, and a driver update is the real fix.
Background software. Browsers with many tabs, sync clients, and antivirus scans all compete for the CPU. Close what you can while tracking.
Plugin load. A session full of heavy plugins can starve the audio thread. Freeze or bypass what you don't need while recording, and save the CPU-hungry processing for mixdown.

Fix 6: Check Your Gain — Clipping Sounds Like Crackle

If the pops are in the recorded file and land only on the loudest moments, look at your levels before you blame the computer. Digital clipping — pushing the input past 0 dBFS — doesn't always sound like obvious distortion. On transient-heavy sources like vocals, acoustic guitar, and percussion, brief clips can read as crackle and splat on the peaks.

The tell is the level relationship: quiet passages are clean, loud ones are not, and the waveform shows flat-topped spikes exactly where you hear the noise. If the noise appears at random spots that aren't especially loud, this isn't your problem — go back to fixes 1 and 5.

The fix is simple and permanent: turn the input gain down. With 24-bit recording there is no need to run hot; peaking somewhere around −12 to −6 dBFS leaves generous headroom and costs you nothing in quality. If that idea feels wrong — if you were taught to record "as hot as possible" — our gain staging guide explains why that advice died with analog tape, and how to set levels through the whole chain.

While you're at the gain stage, also confirm you're not double-driving the input: an active DI or hot pedal output into an instrument input with the gain cranked will crackle on every hard transient.

Fix 7: Hunt Down the Physical Culprit

If everything digital checks out and the crackle persists — especially if it's intermittent, changes when you move things, or follows one particular input — go hardware hunting:

Wiggle test the cables. With monitoring on (at low volume), gently flex each cable at both connectors. Crackle on movement means a failing cable or dirty jack. Cables are consumables; replace them without sentiment.
Swap one variable at a time. Different cable, then different input, then different mic or instrument. Whatever the crackle follows is your culprit.
Phantom power and connections. Don't plug or unplug a mic with +48V engaged; if you do, the resulting pop is expected — and loud enough to risk your monitors and your ears. Constant crackle on a condenser can also indicate a failing cable connection starving the mic of stable phantom power, or humidity in the capsule.
Electrical interference. Dimmers, fluorescent lights, refrigerator compressors, and cheap power strips can inject clicks into an audio chain. If crackle correlates with something switching on, get the audio gear on a different outlet or a decent power conditioner.
The instrument itself. Scratchy guitar pots and failing output jacks are classic sources of recorded crackle that gets blamed on the interface.

Quick Reference: Symptom to Fix

Symptom	Most likely cause	Start with
Crackle worsens as the session grows	Buffer underruns / CPU load	Fix 1, Fix 5
Pops in the recorded file at random spots, any level	Underrun captured during tracking	Fix 1, Fix 5
Steady periodic ticking	Sample rate or clock mismatch	Fix 2
Harsh static bursts, dropouts, disconnects	USB port, hub, or cable	Fix 3
Started after an OS update	Driver	Fix 4
Pops only on loud peaks, flat-topped in waveform	Clipping	Fix 6
Crackle when cables move, or on one input only	Physical connection	Fix 7

When Nothing Works

If you've genuinely worked through all seven and still hear crackle, test the interface on a different computer. Clean there? The problem is your machine — usually a system driver causing interrupt latency, which is diagnosable with free latency-checking utilities on Windows. Crackles everywhere? The interface itself is the suspect, and a repair-or-replace decision beats another week of troubleshooting.

Either way, don't settle. Crackle is not a fact of life in home recording — it's a symptom with a cause, and in nearly every case the cause is somewhere on this list.