When noise cancellation suddenly stops working, first check if the toggle is enabled in the app interface. Sometimes the application loses permission to access your microphone after a system update. Open your operating system's privacy settings and verify that Krisp has microphone access. Restart both the app and the communication software you're using it with—Teams, Zoom, or whatever platform you prefer. If the problem persists, try removing and re-adding your audio devices in the settings.
This typically happens when audio routing gets confused. Make sure you've selected Krisp Speaker and Krisp Microphone as your input/output devices in your conferencing app, not your physical hardware directly. Double-check that the sample rate matches across all devices—mismatched rates cause weird artifacts. Also verify that echo cancellation isn't running both in Krisp and your calling application simultaneously.
Noise cancellation is processor-intensive, especially on older machines. Close unnecessary background applications to free up resources. Lower the audio quality settings if available. If you're on a laptop, connect to power—many systems throttle performance on battery. Consider upgrading your hardware if you regularly work with multiple demanding applications simultaneously.
Unplug and reconnect your headset or microphone. Check if it works in other applications first to eliminate hardware failure. On Windows, set your device as the default communication device in Sound settings. Mac users should check System Preferences under Sound to ensure the microphone isn't muted at the system level.