Sound that plays for 4 seconds, cuts out for half a second, and resumes in an endless rhythm indicates hardware power throttling or driver buffer starvation.
Why This Problem Happens
- Windows USB Selective Suspend powering down USB sound card.
- Audio buffer size set too small in ASIO or driver control panel.
Step-by-Step Troubleshooting Procedure
Step 1: Disable USB Selective Suspend Setting
Objective: Keep USB audio interfaces powered.
- Press Windows Key + R, type powercfg.cpl and press Enter.
- Click “Change plan settings” next to your active power plan > “Change advanced power settings”.
- Expand “USB settings” > “USB selective suspend setting” > Change to Disabled.
Step 2: Increase Audio Buffer Size (ASIO / Driver)
Objective: Prevent buffer underruns.
- Open your sound card control panel (Focusrite, Realtek, Creative).
- Increase buffer size from 64 or 128 samples to 256 or 512 samples.
Step 3: Turn Off Exclusive Audio Enhancements
Objective: Stop software hooks from choking streams.
- Go to Settings > System > Sound > More sound settings > Properties > Enhancements > Disable all enhancements.
Verified Troubleshooting Tips
- Try plugging the audio device into a different USB host controller channel (e.g. switch from USB 3.0 blue ports to USB 2.0 black ports).
Frequently Asked Questions
Why does sound cut out only when playing 4K videos?
High CPU/GPU load while decoding 4K video causes DPC latency spikes that starve the audio thread.