kSpeechPhonemeCallBack

Set the callback function to be called every time the Speech Synthesis Manager is about to generate a phoneme on the speech channel.

Declaration

let kSpeechPhonemeCallBack: CFString

Discussion

The value associated with this property is CFNumber object whose value is a pointer to an application-defined phoneme callback function, whose syntax is described in SpeechPhonemeProcPtr. Passing a CFNumber object that contains the value NULL for the value of this property disables the phoneme callback function.

This property works with the SetSpeechProperty(_:_:_:) function.