First and foremost I feel the extreme need to commend you on being so generous with your information, i've contacted people about this in the past they've all treated me like I was an idiot. I want to build a voice changer out of and Adruino and was wanting to use it in real time I wanted to lower the pitch of my own voice and be able to talk to people as I was doing my performance art what would be the best shield to use for this and do you have anything that you've ever done in the past like this. Also what I need to write code in order for it to work or can I just run a direct in some weird way,  i'm under the impression that you do build some things for people is it also anything that could be commissioned to be built, though I openly admit I feel like this would be awesome for me to do as a project and would love the experience, the shield I like is the dj shield from nootropic.com and my adruino is a uno thank you