Help Center

# settings_input_component Advanced Audio & Video Issues

Sometimes the root cause of transmission problems lies not within the application itself, but in the deeper settings of your operating system or your network.

# volume_off I cannot hear others (despite active levels)

If you see the microphone icons of other participants fluctuating but still hear nothing, the problem is likely with your computer's audio output settings.

# 1. Check the Volume Mixer

In Windows, volume levels can be controlled individually for every application (e.g., your browser). It is possible that the browser is muted there.

  • Procedure: Right-click the speaker icon in the taskbar > Open Volume Mixer.
  • Ensure that the slider for your browser (Chrome, Edge, Firefox) is turned up.

Windows Volume Mixer

Figure: Windows Volume Mixer for app-specific control

# 2. Set the Default Playback Device

Check if Windows is sending the audio to the correct device (e.g., your headset instead of internal monitor speakers).

  • Path: Control Panel > Hardware and Sound > Sound.
  • In the Playback tab, select your desired device and click "Set Default".

Windows Playback Devices

Figure: Selecting playback devices in the Control Panel

# shield_lock Complete Blockage (No image, no sound)

In this case, neither video nor audio is transmitted. You may see your own image and microphone levels, but other participants only see a black screen, and no communication takes place.

# Possible Cause: Network Firewall

Strict corporate firewalls often block the ports required for real-time communication.

  • Check: Run our System Check. Does an error message appear in the "Video Conference" section stating that no connection could be established?
  • Solution: Contact your IT administration. They must open specific ports for WebRTC connections.

Info for Admins

Our support team is happy to provide the necessary technical specifications (IP ranges and ports) for your IT department. Just reach out to us!

# Have you already checked the basic settings?

If you have not yet performed these steps, please first take a look at our FAQ Solving audio and video problems.

Helpful Links & Tutorials

You can find further support in our guides:

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