I am writing an application for Mac OSX in Xcode/Objective-C that uses the IOBluetoothHandsFree class in the IOBluetooth module. The application allows a user to use their computer as a speakerphone for their phone over bluetooth. I'm running into an issue where the volume of all other applications on the computer get much lower when a call is initialized and the computer is used as the speakerphone (called "audio ducking"). How can I go about disabling this functionality in my application?
After talking with the Apple Bluetooth team, it turns out that this feature is not supported in the latest version of the IOBluetoothHandsFree class.