Output groups in SoundSource enable you to route audio from an application or the system to multiple output devices simultaneously. Use it to play audio through both headphones and speakers simultaneously, or send audio to multiple external devices.

Device groups can contain a mix of any kind of output device: built-in outputs, external audio interfaces, Bluetooth devices, and even AirPlay devices.

Accessing Output Groups

Output groups are managed from the Output Devices window, which can be accessed by clicking the Options (Gear) menu in SoundSource’s main window, and choosing the Output Devices option. Alternatively, use keyboard shortcut Cmd-Shift-G.

Creating an Output Group

To create a new output group, click the + New Group button at the bottom of the sidebar in the Output Devices window. This will create a new output group with no devices selected.

Output groups can be renamed by clicking the edit icon next to the current group name at the top of the window. Additionally, you can choose a custom icon for the group to help quickly identify it within SoundSource.

Managing Devices in a Group

Any available output device will be listed for possible addition to an output group. Devices that are already included in another output group will be indicated with a checkmark next to their name.

To add a device to an output group, check the checkbox next to the device name. To remove a device from the group, uncheck the checkbox.

The volume of each device in the group can be adjusted independently, using the volume slider and mute toggle next to its name. This enables you to balance audio levels across multiple outputs.

Using Output Groups

Once an output group is created, it can be selected as an audio output destination for any individual application or the combined system audio. In SoundSource’s main window, click the output device selector next to an application or the system output, and choose the desired output group from the list.

From SoundSource’s main window, you can also adjust the volume within an output group. The device group offers an option to reveal volume sliders for each speaker in the group, which can each be adjusted independently.

When SoundSource is running, any output groups you make will be available throughout your system. Applications which offer audio device selectors can play to these groups, and they will be listed as virtual outputs in the Sound section of the System Settings app.

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