See also: Text To Speech (TTS) Engine

本文为微软官方 TTSApp (SAPI 5.3) 范例原文转载。

 

TTSApp is an example of a text-to-speech (TTS) enabled application. This sample application is intended to demonstrate many of the features for SAPI 5 in a single coherent application. It is not a full featured TTS-enabled application although the foundations of many of the options are present.

TTSApp allows you to hear the resulting audio output from the TTS process for text entered in the main window. Alternatively, you can open a file and TTSApp will speak the contents of that file.

Each word is highlighted in the text window to indicate the current TTS processing position. Features include:

SAPI5 TTSApp	The main display window of the TTSApp sample application.
Text window	TTSApp speaks the text contained in this window using TTS.
Speak	Initiates the TTS process.
Voices	Selects the voice for the audio output.
Rate	Selects the rate of speech.
Volume	Selects the volume level of the audio output stream.
Open File	Enables TTSApp to open and speak the contents of a stored text file.
Pause	Pauses the TTSApp text phrase speaking process.
Resume	Resumes the TTSApp text phrase speaking process.
Stop	Stops the TTSApp text phrase speaking process.
About	Displays the About TTSApp information dialog box.
Format	Selects the audio format.
Skip	Specifies the number of sentences to skip in the phrase speaking process.
Speak wav	Speaks the contents of a stored wav file.
Reset	Resets TTSApp to its original configuration setting.
Save to wav	Saves the contents of the TTSApp audio output stream to a wav file.
Show all events	Displays all TTSApp SAPI events.
Process XML	Specifies that the TTS voice will speak the XML tags and their contents in the TTS process.
Mouth Position	Displays mouth shapes for phrase elements as they are spoken.

• 
  SAPI5 TTSApp main window.
  Use the main TTSApp window to select the configuration settings that affect the TTS process. The elements of TTSApp are listed above. Click the text in the left column for additional information.

• 
  Text window
  The text content of this window is spoken by TTSApp. All text entered in this window is processed and spoken by TTSApp voice.
  By default, the text content of this window is, " Enter the text you wish spoken here. "

• 
  Speak
  Click Speak to initiate the text-to-speech process.

• 
  Voices
  Select a voice using the drop-down list. TTSApp uses the selected voice when speaking a wav file or the contents of the text window.

• 
  Rate
  Move the slide control to the right to increase the speech rate, and to the left to decrease the speech rate. The Rate level determines the number of text units spoken per minute.

• 
  Volume
  Move the slide control to the right to increase the volume level, and to the left to decrease the volume level.

• 
  Open File
  Click Open File to access the Windows Open dialog box. Select the file, and then click Open .

• 
  Pause
  Click Pause to interrupt the TTS process.

• 
  Resume
  Click Resume to continue the TTS process.

• 
  Stop
  Click Stop to stop the TTS process.

• 
  
  About
  The About window displays information related to TTSApp. Click OK to close the About window.

• 
  Format
  Use the drop-down list in Format to select one of the following format rates.

Selectable format rates 8kHz8 Bit Mono8 Bit Stereo16 Bit Mono16 Bit Stereo 11kHz8 Bit Mono8 Bit Stereo16 Bit Mono16 Bit Stereo 12kHz8 Bit Mono8 Bit Stereo16 Bit Mono16 Bit Stereo 16kHz8 Bit Mono 8 Bit Stereo16 Bit Mono16 Bit Stereo 22kHz8 Bit Mono8 Bit Stereo16 Bit Mono16 Bit Stereo 24kHz8 Bit Mono8 Bit Stereo16 Bit Mono16 Bit Stereo 32kHz8 Bit Mono8 Bit Stereo16 Bit Mono16 Bit Stereo 44kHz8 Bit Mono8 Bit Stereo16 Bit Mono16 Bit Stereo 48kHz8 Bit Mono8 Bit Stereo16 Bit Mono16 Bit Stereo

• 
  Skip
  Use the spin box to select the number of skipped sentences. Skip functions only while text is being spoken.

• 
  Speak wav
  Speak wav enables TTSApp to speak the contents of a wav file. Click Speak wav to access the Windows Open dialog box. Select a wav file from the dialog box, and then click Open .

• 
  Reset
  Click Reset to reset TTSApp to its original configuration state.

• 
  Save to wav
  Click Save to wav to save the TTSApp audio output stream to a wav file.

• 
  Show all events
  Select Show all events to display SAPI related events in the event display window as the input text is processed by TTSApp.

• 
  Process XML
  Select Process XML to include the XML tags and their contents in the audio output stream from TTSApp. When this option is selected, the application will parse and interpret the XML tags literally.

  For example, if the Process XML option is selected, the application could be paused for the specified number of milliseconds in the SILENCE tag.

  Process XML	XML tag	Result
  	<SILENCE MSEC = "3000"/>	The application would speak 3000 milliseconds of silence.
  	<SILENCE MSEC = "3000"/>	The application will speak the phrase, "less than silence msec equals quote three thousand quote slash greater than."

• 
  Mouth Position
  The mouth position displays the various mouth shapes and positions as TTSApp processes the input text stream.

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