Audio Midi Setup: Play audio through multiple output devices at once
If you have several stereo output devices, you can have audio play through all of them by creating a multi-output device. For example, when you add two devices to a multi-output device, audio sent to the master device will also play through any other device in the stack. To get started, open Audio MIDI Setup.
- In Audio MIDI Setup, click the Add button (+) in the Audio Devices window, and then choose Create Multi-Output Device.
A new multi-output device appears in the list on the left side of the window. To rename the device, double-click it.
- With the new multi-output device selected, on the right side of the Audio Devices window, select the Use checkbox of each device you want to include in the multi-output device.
- To set the master device for the multi-output device, choose an output device from the Master Device pop-up menu.