I have a whole studio of gadgets and boxes that make one noise or the other. I came across this little vocoder program awhile back but haven't had time to mess with it much. Maybe you want to give it a try- Check out "vocoder" on the download site. Feed it a sound wave (like a good fat analog synth patch) and a vocal track and it spits out a wave combination of the two. I got it free, I'm not sure if it is still offered at that great price. http://www.analogx.com/contents/download/audio.htm