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GiO by APOGEE – User’s Guide
OS X Audio MIDI Setup
The OS X utility Audio MIDI Setup provides settings to choose GiO
for Mac sound input/ output and control GiO’s parameters. To open
Audio MIDI Setup, choose Applications > Utilities > Audio MIDI
Setup.
Selecting GiO for Mac Sound Input/Output
Controlling GiO’s Input/Output Parameters
• Select GiO in the Default Input menu.
• Select in the Default Output.
• Leave System Output set to Built-In Audio to hear OS X alert
sounds and user interface sound effects via the Mac’s built-in
speakers.
• Select GiO in the Properties For menu.
• To set GiO’s input gain, use the Volume slider under Audio Input.
• Select an output operating characteristic in the Audio Output
Source menu:
Select Line Out when connecting GiO to headphones,
powered speakers, a mixing console or a home stereo;
Select Amp to set GiO’s output to a xed level, to avoid
inadvertently changing GiO’s output level.
Setting GiO’s Sample Rate
GiO operates at a sample rate of 44.1kHz or 48kHz . In most cases
the sample rate is set by the audio application with which GiO is
streaming audio. For example, when working with GarageBand,
GiO’s sample rate is automatically set to 44.1kHz, to match the
GarageBand song’s sample rate. For those audio applications that
don’t include a sample rate selection, such as Apple’s iTunes, GiO’s
sample rate may be selected in either Format menu under Audio
Input or Audio Output. For more information on which sample rate to
work at, see page 20.