Hearwho.com is a free online service which converts text (type it in or copy + paste) to a downloadable audio mp3.
Choices include: male or female voice, English or Spanish language, and then a couple of choices for quality.
I’m not sure how well it works with a large chunk of scientific or medical text, but still an interesting project.
http://www.hearwho.com/
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Very cool!
Cool. Thanks for posting this!
David Noah