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No voice may occur in the following scenarios:

  • The local user cannot hear any voice from the remote user.
  • The remote user cannot hear any voice from the local user.
  • The local and remote users cannot hear each other.

Step 1: Self-check

Check the following:

  • Ensure that the app has granted access to the audio devices.

  • Ensure that the app receives the onJoinChannelSuccess callback, which means users have joined the channel successfully.

  • Check if you muted yourself or others.

  • Check if you called the adjustRecordingSignalVolume or adjustPlaybackSignalVolume method to mute the audio.

  • Check if the recording device is working. You can call the startEchoTest method to test it.

  • Check if the headset is working.

  • Call the setEnableSpeakphone method and ensure that you cannot hear any voice from the headset when the speaker mode is on.

  • Check if the headset is working and if the audio output is set to the headset.

  • Test your device with the Agora Video Call demo (downloaded from Agora.io).

  • In Windows, if users cannot hear any voice from the speaker or headset:

    1. Right click on the speaker icon and select Sounds.



    2. On the Playback tab, check whether the green bar of the speaker changes according to the volume. If not, the speaker is not working.

      If the green bar changes according to the volume, check whether you can hear any audio output with another app. If yes, there is something wrong with your app. 
      If the green bar does not appear regardless of the app, unplug and plug the headset, change the playback device, or stop and restart the playback device.
    3. If none of these methods work, check the recording device by clicking on the Recording tab and checking whether the green bar will change according to your voice volume. Ensure that you select the correct device when multiple devices are available.

Step 2: Contact Agora Customer Support

If the issue persists, contact Agora customer support and submit the issue with the following information:

    • The name of the channel where the users cannot hear any noise.
    • The uids of the users who cannot hear any voice in the channel.
    • The time frame during which users cannot hear any voice.
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