[don't know how to delete the post]
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This post to list what we can do with the MaryTTS service in MRL.
I just discover it, there is a lot of interresting things
AudioEffets ( great tool to tweak the voice ) :
mouth.setAudioEffects() ->
Robot
Whisper
F0Scale
F0Add
Rate
Whisper
Stadium
Chorus
FIRFilter
JetPilot
Download voices
installSelectedLanguagesAndVoices() ->