I use ⓍTTS for my text-to-speech services. It is an excellent speech model that lets you clone voices in different languages by use of a 3-second audio clip; you can use your own voice for instance. It comes at my favorite price: free. The trick is injecting the OOTP pbp text into the engine. THis would require some code (like an external running exe), and would probably make use of XML output to accomplish.
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