MAC
1.
Go to System Preferences
2.
Click the "Input" tab.
3.
Make sure C-Media USB Audio Device is selected, then
close the window.
4.
Go to Applications
5.
In the "Audio Devices" tab under "System Settings,"
select C-Media USB Audio Device as your Default
Input, then close the window.
Sound.
Utilities
Audio MIDI Setup.
3