It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

Pecand would seem like the obvious answer, but in some of the flashback scenes Lycentia clearly did welcome him. She didn't know Pecand was the murderer until the end of the game, well after that voice recording was done. But who else could it be?
The guy playing the piano who recorded her. All he could get her to say for her recording was when she yelled at him. Thats why he called her rude.