Apple Mac systems come with a basic audio controller to play the internal speaker system or via the audio ports headphones or a stereo system. However, if you want to use another controller as a multi-channel USB interface for recording with GarageBand, Logic, or any other use, you can add and configure the system to be used in place of Supervisors' Apple. Well worth having, if you configure your system with multiple interfaces, then you may encounter an issue where the system may return to its internal controller after a reboot, if your external device loses power or there is another modified system configuration. this is usually not a problem and can be treated by going to System Preferences and choose the device to use for alert sounds, exit the system default, and default entry under the respective tabs these parameters. However, in addition to this approach, the system provides a faster way to a specific device for recording or playback.
If you turn the volume control in the menu bar (default, but it can also be activated in system preferences audio), you can access this option to change the output volume of the system. In addition, if you hold down the Option key when you click on this menu, options can change volume settings to a menu selection device you should see the audio controllers available and be able to choose. You can also select the option to open the system preferences audio for more detailed configuration options.
Unfortunately, there is no option in this menu to access the Audio MIDI Setup utility, which contains the global devices, audio format, and channel settings, but can be found with a quick search Spotlight .
