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Overview

SmartBody is responsible for acquiring the audio that is associated with a character utterance. This audio is then preferably played back by the game engine, but it can also be played back by SmartBody itself. To acquire the audio, SmartBody can either:

• read in an existing prerecorded speech audio file
• send a request to a text-to-speech engine

This document focuses on the latter. 

SmartBody will send a RemoteSpeechCmd message to the TtsRelay module, requesting for a line of text to be converted into audio. The message contains what voice to use and where to put the generated file. TtsRelay will send back a RemoteSpeechCmd message, containing the exact file location, a viseme schedule with detailed timing information for lip-synching and word boundary timing information for synchronization of nonverbal behavior as specified through BML. 

TTS Engines

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Rhetorical (RVoiceRelay)

Voice Codes:
set character doctor voice remote M021 <- Saso Doctor's voice
set character elder voice remote M009 <- Saso Elder's voice

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Voice Codes:
set character doctor voice remote BradVoice

RemoteSpeech Interface

To trigger a TTS call:

sbm bml char doctor speech "Hello world.  Testing Text to Speech"

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