Hearing audio dropouts or clicks during music production or streaming? It might not be your software—but a hidden Windows problem called DPC latency.
What Is DPC Latency?
DPC stands for Deferred Procedure Call. It’s how Windows handles real-time tasks like audio or network processing.
If one driver takes too long to respond, your audio stutters, pops, or delays.
How to Check Your DPC Latency
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Download LatencyMon
[Link to LatencyMon tool] -
Run the tool and start monitoring
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Look for warnings like:
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“Your system appears to be suitable for real-time audio and other tasks…”
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“One or more drivers are causing high latency.”
How to Fix High Latency
Step 1: Update Drivers
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Audio, network, GPU
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Prioritize Realtek, NVIDIA, Intel drivers
Step 2: Disable Unnecessary Devices in Device Manager
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WLAN Adapter
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Bluetooth
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Webcam
Step 3: Change Power Plan
Set to High Performance
Control Panel → Power Options → Choose plan → High Performance
Step 4: Disable CPU Power Saving
In BIOS/UEFI:
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Disable Intel SpeedStep / AMD Cool’n’Quiet
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Turn off C-States if latency-sensitive
Real Fix: BIOS Update
In some laptops, outdated BIOS causes spikes. Always check manufacturer’s support page.
Final Tip: Audio Interface Buffer Size
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If using FL Studio, Ableton, etc., increase buffer to 256 or 512 samples
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Use ASIO drivers whenever possible
📌 DPC latency is invisible—but if you work with audio, solving it can mean the difference between frustration and flawless performance.