hello ye you can put someone singing in poser mine is poser 12.to put a figure siniging must  a vocal expression without the  music.for poser as far as I know.

you do your test singing a a piece of any music.and you will hear it .in other word, it only accept voice intead of music. I am not very expert on this matter. but pratice my kate figure singing even in her female voive using another program, The program for this is voxal voice changer. I have kate singing gospel music!!!!If this help ypu,  place your coment