http://bugs.winehq.org/show_bug.cgi?id=56350
--- Comment #5 from Louis Lenders xerox.xerox2000x@gmail.com --- (In reply to Nikolay Sivov from comment #4)
This looks like a number of mpeg audio frames (leading bytes fff3 84c4). Was that generated on Windows?
No, it's generated on wine using the program.
You can find it in "Text to Speech Player/_internal/tts/line.wav" if you let the program run and choose some textfile to recognize the text from.