Audio Quality Issues

The Communications APIs platform spatially distributes participants in the conference using headphone virtualization. To support this feature the participant's audio output device must support stereo output.

When investigating spatial audio issues:

  • Independently test the output device using a test track, such as this Dolby demo video, to ensure that you can hear a difference between left and right channels.
  • When using a 3.5mm analog headset, ensure that the wiring is compatible with the device it is being connected to. For information on the different standard TRRS wirings, see this Wikipedia page.
  • If using a Bluetooth headset or speakerphone be aware that the Headset Profile and Hands-Free Profile only support monaural output audio. This means that whenever the microphone of a Bluetooth device is enabled, the output audio changes from stereo to mono, and the audio bandwidth also often reduces. An alternate way to use a Bluetooth headset is to use the headphones for output and a separate microphone, such as the built-in microphone on a laptop, for input. In doing so the Bluetooth headset should operate in the Advanced Audio Distribution Profile and provide stereo and full-band audio. Alternatively, you can utilize Bluetooth headsets that provide a custom wireless link between the client device and the headset such as the Poly Voyage UC headset.

If further assistance is required, please contact the Dolby support team to report an audio issue.