![](https://help.apple.com/assets/5E3B0EF4094622DD68F037E7/5E3B0EF6094622DD68F037EE/en_GB/4b2fc2149b381964a1e2f597ea68882e.png)
![The Audio Devices window showing an aggregate device in the 3D Isometric View. In the list of streams at the top of the window, a stream with four channels is selected. The list of speakers is below the view.](https://help.apple.com/assets/5E3B0EF4094622DD68F037E7/5E3B0EF6094622DD68F037EE/en_GB/55c1d932fa1661f390e3a365572722de.png)
Create a surround sound environment
Connect external speakers to your Mac or other attached audio output device to create a surround sound environment in any room of your home.
![The MIDI Studio window showing various MIDI devices in Hierarchical View.](https://help.apple.com/assets/5E3B0EF4094622DD68F037E7/5E3B0EF6094622DD68F037EE/en_GB/594a9da01055b05fdc56ed5a1a0b5d77.png)
Visually describe your MIDI device configuration
After you connect your MIDI devices — for example, keyboards and sequencers — use MIDI Studio to lay out and show the connections between them.
To explore the Audio MIDI Set-up User Guide, click Table of Contents at the top of the page, or enter a word or phrase in the search field.