I use it this way
./mimic -t "Mozilla is a free-software community created in 1998 by members of Netscape. The Mozilla community uses, develops, spreads and supports Mozilla products, thereby promoting exclusively free software and open standards, with only minor exceptions." -voice voices/mycroft_voice_4.0.flitevox
Need to check it again, maybe cut corresponding Youtube snippet 1:50 - 2:07 and compare.