You can switch the audio output device (a speaker or headphones) used to play audio from all publishers and subscribers (in all Vonage Video sessions in the browser).

The OT.getAudioOutputDevices() method enumerates the audio and video input devices available to the browser.

The OT.getActiveAudioOutputDevice() method identifies the currently active audio output device.

Use the OT.setAudioOutputDevice() method to set the audio output device.

For example, the following code shows you how to implement a cycleAudioOutput() function that cycles through the available audio output devices:

// Cycling through audio output devices
let currentIndex = 0;
const audioOutputs = await OT.getAudioOutputDevices();
const currentOutputDevice = await OT.getActiveAudioOutputDevice();
audioOutputs.forEach((device, index) => {
  if (device.label === currentOutputDevice.label) {
    currentIndex = index;
  }
});

const cycleAudioOutput = async () => {
  currentIndex += 1;
  let deviceId = audioOutputs[currentIndex % audioOutputs.length].deviceId;
  await OT.setAudioOutputDevice(deviceId);
};