For TTS, Primo uses whatever voice engine is installed under Android Settings/Language & input/Text-to-speech output. Primo does not control what shows up here. If you don't have a TTS engine installed the TTS voices in the voice folder won't be available to select. Try installing Ivona text to speech from Google Play and then download the voice/s of your choice. At the moment they are free. Then set it up as the default TTS engine and you should be good to go.
Cheers, Ian
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