How to Troubleshoot Call Audio Issues in KrispCall

If you're experiencing audio problems during a KrispCall call, such as no sound, one-sided audio, echo, or choppy, distorted voice, there may be several causes. These issues can range from incorrect device settings to network instability. 


Listed below are the most common causes and steps to resolve them:


Initial Checks

Before adjusting advanced settings, try these quick steps. Most call issues are solved here.

  • Check your hardware: Ensure your headset or microphone is fully plugged in. Check that you are not on physical mute.
  • Test your volume: Make sure your speaker volume is up, and the correct output device is selected in your system settings.
  • Refresh the app: Close and reopen the KrispCall app or refresh your browser tab. This clears temporary glitches.
  • Check permissions: Check your browser's address bar or your system's privacy settings. Ensure KrispCall has permission to use your microphone.
  • Close extra tabs: High CPU usage can hurt audio. Close any apps or tabs you do not need right now.


Troubleshoot by Issue


Microphone or Speaker Not Selected Correctly

One of the most common causes of audio issues in KrispCall is selecting the wrong input or output device. This can happen after connecting a new headset, updating your system, or switching between devices.


To fix this:

  • Open the KrispCall app or web interface.
  • Go to Settings->App Settings -> Mic and Audio.
  • Under Input Devices, select your preferred input device from the dropdown.
  • Under Output Devices, select your preferred output device from the dropdown.
  • Use the Test Mic option to confirm that both devices are working correctly.


Once the correct devices are selected, try making a test call to confirm the audio is clear.


Microphone Permission Not Granted to KrispCall

If the other person cannot hear you during a call, it is very likely that KrispCall has not been granted permission to access your microphone. This is especially common after a fresh installation or a system/browser update.


To fix this: 

  • On Windows: Go to Settings->Privacy & Security->Microphone, and make sure KrispCall is allowed to access your microphone. 


  • On macOS: Go to System Settings->Privacy & Security->Microphone and enable access for KrispCall.


  • On Browser: If you're using KrispCall in a browser, make sure your browser hasn't blocked the microphone. Click the lock icon in your browser's address bar and toggle the microphone permission to Allow. For detailed steps, refer to our guide on How to Allow Microphone Access for KrispCall on Your Browser.


Microphone Muted or Volume Set Too Low

Sometimes, the audio issue is caused by something as simple as the microphone being muted or the speaker volume being too low.


To fix this: 

  • Check the KrispCall interface and make sure the mute button is not active during your call.
  • Check your system volume and ensure it is not muted or set too low.
  • If you're using a physical headset or external speaker, check if it has a dedicated mute button or volume dial and adjust accordingly.
  • On Windows, right-click the sound icon in the taskbar->Open Volume Mixer->ensure KrispCall is not muted.
  • On macOS, go to System Settings->Sound->confirm the output volume is at an audible level.


Poor or Unstable Internet Connection

Since KrispCall uses VoIP technology, your audio quality depends directly on your internet connection. A slow, unstable, or high-latency connection can cause choppy audio, robotic voice, missing words, or one-sided audio.


To fix this: 

  • Run a speed test to check your current internet speed. A stable connection of at least 1 Mbps upload and download is recommended for clear VoIP calls.
  • If you're on Wi-Fi, switch to a wired (Ethernet) connection for a more stable signal.
  • Close any background applications or browser tabs that may be consuming bandwidth (e.g., video streaming, large file downloads).
  • Restart your router or modem if the connection has been slow for a while.


Outdated Browser or KrispCall App Version

An outdated browser or the KrispCall desktop app can lead to audio codec mismatches, feature incompatibilities, or known bugs that have already been fixed in newer versions.


To fix this: 

  • If you're using KrispCall in a browser, update it to the latest version. 
  • If you're using the KrispCall desktop app, check for available updates within the app or download the latest version from the KrispCall website.
  • After updating, fully close and restart the browser or app before making a test call.


Browser Extensions or Firewall Blocking Audio

Certain browser extensions, such as ad blockers or privacy tools, can interfere with KrispCall's WebRTC-based audio streams. Additionally, strict firewall or antivirus settings on your device or network may block the ports that KrispCall uses for call audio.


To fix this: 

  • Open your browser in Incognito/Private mode (which disables most extensions by default) and try making a call. If audio works in private mode, an extension is likely the cause.
  • Go to your browser's extension settings and disable extensions one by one to identify which one is causing the issue.
  • Temporarily disable your antivirus or security software to see if it is interfering, and whitelist KrispCall if needed.


Echo or Feedback During Calls

If you or the person you're speaking with hears an echo, it is usually caused by speaker's audio being picked up by the microphone.


To fix this:

  • Switch to a headset or earphones, as they physically separate the speaker from the microphone and prevent audio feedback.
  • Lower your speaker volume so it is less likely to be picked up by the mic.
  • If you're using an external speaker (e.g., a Bluetooth speaker), try switching to a wired headset instead for better audio isolation.


Audio Issue on One Specific Device Only

If audio works perfectly fine on one device but not another, the problem is most likely device-specific rather than an account or network issue.


To fix this:

  • Try logging in to KrispCall on a different device and making a test call.
  • Try using a different browser (e.g., switch from Chrome to Firefox or Edge) to see if the issue is browser-specific.
  • Check whether your device's audio drivers are up to date.
  • If the issue occurs only with a specific headset or external mic, test with a different audio device to confirm.


Not sure what's causing your audio issue? Here's a quick way to figure it out:

  • If the problem only happens with one specific contact, the issue is likely on their end.
  • If the problem happens at the same time every day, your network may be experiencing peak-hour congestion.
  • If the problem only appears on one device, it's a device-specific issue; test on another device to confirm.


Note: If you've gone through all the steps above and the issue persists, please reach out to the KrispCall Support Team. Our team will help identify whether the problem is related to your device, network, or account configuration.

Updated on: 12/05/2026

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