M-Audio OmniStudio USB User Manual page 24

When prompted, click "Continue Installation."
When prompted, click "Restart" to finish the installation.
After the computer has restarted, plug the OmniStudio USB into your computer's USB Port and power it on. Go to "System Preferences" in
the Apple Menu. Select the "Sound" preference panel, and click the "Output" tab. Select "M-Audio OmniStudio USB" to choose the OmniStudio
USB as your default output device.
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