kSpeechOutputToAudioDeviceProperty
Set the speech output destination to an audio device file or to the computer’s speakers.
Declaration
let kSpeechOutputToAudioDeviceProperty: CFStringDiscussion
The value associated with this property is a CFNumber object that contains an AudioDeviceID. To play the speech output to an audio device, use the AudioDeviceID that represents the device; to generate sound through the computer’s speakers, use 0.
This property works with the SetSpeechProperty(_:_:_:) function.