These instructions must be followed in order for the Mac to play sounds through the speakers. In order to access audio from Youtube, iTunes, etc. you must select the “St 1” button located in the MONITOR section of the C24 Console. Selecting the “Sum” button in addition to “St 1” allows you to listen to audio from Pro Tools simultaneously.
d.Now you can use the Mac’s volume controls as well as the “Control Room” knob on the C24 for your volumes. Be careful with your “Control Room” volume as the Mac will always be set at last-previously-used volume, which could result in extremely loud volumes.