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The short answer: Crackling sounds from your audio interface are almost always caused by one of three things: a buffer size that’s too small for your CPU to handle, a USB power or bandwidth issue, or outdated/buggy drivers. You can usually fix it by increasing the buffer size, switching to a powered USB port, or reinstalling the latest manufacturer drivers.
Buffer size is the amount of audio data your computer processes at once. A low buffer (like 32 or 64 samples) reduces latency, but it demands a lot from your CPU. If your CPU can’t keep up, you’ll hear crackles, pops, or stutters. This is especially common when you run many plugins or have a slower processor.
How to fix it: Open your DAW’s audio settings or the interface control panel. Increase the buffer size step by step: start at 128 samples, then try 256, 512, or even 1024. The crackling should disappear once you hit a size your system can handle. For tracking, you might need a low buffer, but for mixing, 256 or 512 is usually fine. If you’re doing both, consider freezing tracks or disabling plugins while recording.
Also, check your sample rate: 44.1 kHz or 48 kHz is standard. Setting it higher (like 96 kHz) increases CPU load and can cause crackles on less powerful computers.
Many audio interfaces are bus-powered, meaning they draw power from the USB port. If the port doesn’t supply enough stable power, you’ll get clicks and pops. This is common with laptops, especially when running on battery or using unpowered USB hubs.
How to fix it: Plug your interface directly into a USB port on your computer (not a hub). If you’re on a laptop, use a port that supports higher power (often a USB 3.0 port or one with a battery symbol). If that doesn’t help, try a powered USB hub (one with its own AC adapter). Also, avoid connecting other power-hungry devices to the same hub.
You should also check your USB cable: use a high-quality, shielded cable that’s not too long (under 6 feet). A faulty cable can cause intermittent connections and crackling.
Drivers are the software that lets your computer talk to your interface. If they’re outdated, corrupted, or not properly installed, you’ll hear glitches. This is especially common after a Windows update or if you switch between different USB ports.
How to fix it: Go to your interface manufacturer’s website and download the latest driver for your specific model and operating system. Uninstall the old driver first (via Device Manager on Windows, or the uninstaller on Mac), then install the new one. Restart your computer after installation. If you’re on Windows, also disable any power-saving settings for USB ports: go to Device Manager > Universal Serial Bus controllers > right-click each USB Root Hub > Properties > Power Management > uncheck “Allow the computer to turn off this device to save power.”
Even with a good buffer size, your computer may be too busy to handle audio in real time. Background tasks like antivirus scans, browser tabs, or automatic updates can steal CPU resources and cause crackling.
How to fix it: Before recording, close all unnecessary applications. Use Task Manager (Ctrl+Shift+Esc on Windows) or Activity Monitor (Mac) to see what’s using CPU. If an app is hogging power, close it. Also, make sure your computer’s power plan is set to High Performance (Windows) or that your Mac isn’t in low-power mode. If you’re using Wi-Fi, temporarily turn it off, as network activity can cause interference.
Sometimes the problem is physical. A loose cable, a dirty connection, or an electrical grounding issue can cause crackling. This is more likely if the crackling is intermittent or happens when you touch the cable or interface.
How to fix it: Check all connections: USB cable, instrument/line cables, and power adapters. Unplug and reseat them firmly. Try a different cable to rule out a faulty one. If you’re using a laptop, plug it into a grounded power outlet (not two-prong). If you’re using a desktop, ensure it’s properly grounded. You can also try moving your interface away from other electronics, like monitors or phones, to reduce electromagnetic interference.
If your interface and your DAW are set to different sample rates, you’ll get clicks or pops. This can also happen if you have multiple digital devices connected via S/PDIF or ADAT.
How to fix it: In your DAW, set the sample rate to match your interface’s control panel (e.g., both at 48 kHz). If you have external digital gear, make sure the interface is the clock master, or set the correct clock source in the control panel. Disconnect any unused digital devices to simplify the clock chain.
Q: Why does my audio interface crackle only when I play games or watch videos?
A: This is usually because the system sound is set to a low buffer or the interface is handling system audio inefficiently. Increase the buffer size in the interface control panel for the system output, or switch your default playback device to your computer’s built-in speakers for non-music use.
Q: Can a faulty audio interface itself cause crackling?
A: Yes, but it’s rare. If you’ve tried all the software fixes and the issue persists, test your interface on another computer. If it still crackles, the hardware may be defective, and you might need to contact the manufacturer.
Q: Is it better to use an external powered USB hub?
A: For bus-powered interfaces, a powered hub can provide cleaner, more stable power, which often solves crackling. For interfaces with their own power supply, a hub isn’t necessary, but a high-quality port can still reduce issues.
If you’re still struggling after trying these fixes, it might be time to consider an upgrade. A higher-quality interface with better drivers and more robust power management can make a big difference. Check out our guide on What Audio Interface to Buy in 2026: Top 10 Compared to see options that are known for reliability and clean sound.
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