#include #include extern "C"{ OSStatus AudioHardwareServiceGetPropertyData(AudioObjectID inObjectID, const AudioObjectPropertyAddress *inAddress, UInt32 inQualifierDataSize, const void *inQualifierData, UInt32 *ioDataSize, void *outData); Boolean AudioHardwareServiceHasProperty(AudioObjectID inObjectID, const AudioObjectPropertyAddress *inAddress); OSStatus AudioHardwareServiceIsPropertySettable(AudioObjectID inObjectID, const AudioObjectPropertyAddress *inAddress, Boolean *outIsSettable); OSStatus AudioHardwareServiceSetPropertyData(AudioObjectID inObjectID, const AudioObjectPropertyAddress *inAddress, UInt32 inQualifierDataSize, const void *inQualifierData, UInt32 inDataSize, const void *inData); }