Your comments

'"via API, using simple Javascript calls, and "queue up" several audios for speech."

-How obtuse. You sound like my data systems officer. Every time I ask him why something doesn't work or how a system works, he uses a bunch of technical jargon that non-data professionals do not understand. Your answer here is the same thing. If your customers knew how to program in Java, do you think they would be asking you this question? Unbelievable.