Tasks

• + sharedInstance
•   delegate property
• – setActive:error:
• – setActive:withFlags:error:
• – setCategory:error:
• – setPreferredHardwareSampleRate:error:
• – setPreferredIOBufferDuration:error:
•   category property
•   preferredHardwareSampleRate property
•   preferredIOBufferDuration property
•   inputIsAvailable property
•   currentHardwareSampleRate property
•   currentHardwareInputNumberOfChannels property
•   currentHardwareOutputNumberOfChannels property