Nuance Vocalizer Developer's Guide - Avaya Support

Chapter 4Playing TTS prompts fromyour application4Vocalizer’s TTS engine puts a human voice to your application interface,producing intelligible, synthesized speech from text input. This chapterdescribes how to:■■Invoke a TTS prompt from applications written with Nuance developmentAPIs, including SpeechObjects, NuanceSpeechChannel, and the RCEngineSpecify a TTS prompt using VoiceXMLNote: This chapter describes the APIs for specifying TTS prompts within yourapplication code. At runtime, you must have a TTS server running andconfigured as described in Chapter 3 for the TTS API calls to work.For information on the conventions used to synthesize the text based on theway you transcribe it, see Chapter 9.Using Nuance prompt playback functionsAll Nuance development APIs include mechanisms for specifying TTS prompts.These mechanisms are similar to the way you work with prerecorded prompts,except that you specify the text to synthesize instead of the name of an audiofile. You specify the text directly in your function call, for example, in theRCEngine:PlayPrompts call.The following sections describe the mechanisms in each Nuance API, including:■■■SpeechObjectsNuanceSpeechChannelRCEngineChapter 4 Playing TTS prompts from your applicationUsing Nuance prompt playback functions27