It's a project for my audio class. We have to just use the human voice and I wanted to do a sort of human life span where the voices of different stages kind of morph into each other. I could record my own voice, but I'm not sure how I could make myself voice sound "elderly". I was going to just try to use one of the voices I have for the adult voice, but I wasn't sure what else I can do besides pitch shifting.
While I'm asking questions, is there a free converter I can download to convert aif and mp3s to wav files?