Add voice effects to your Text-to-speech audio to create new sounds
Voice filters allow you to adujst the qualities of our Text-to-speech voices.
Effect -Our filters allow you to alter the Pitch, Speed and Duration of the audio or add a robotic quaility to the audio.
EffectLevel -Pitch, Speed and Duration can be applied at Effect Levels or multiples of -3,-2,-1,0,1,2,3. The robotic filter can be applied at a multiple of 0,1 or 2.
Adding a filter to a Text-to-speech call requires adding two parameters to the end of your sayText() call.