Provides a sample text-output-only Synthesizer support that doesn't make any noise. Instead of sending output to a speaker in spoken form, it sends text to the standard output in a form that should be useful for debugging purposes.

To include this in the list of speech synthesizers, add the following line to your `speech.properties` file:

    TextSynthEngineCentral = com.sun.speech.engine.synthesis.text.TextEngineCentral