Kylo Ren Voice Changer

Sorry if this is a repeat, but I haven't seen it posted anywhere.

I've been thinking about how to do a voice changer in a Kylo Ren helmet. After seeing a Black Series helmet in action, I realized that no electronic voice changer will work properly. The problem is that Kylo's helmet is so open. Compared to a large Vader helmet, Kylo's doesn't have a lot of space, and his hair/neck are open at the bottom. So no matter how good the voice changer is, you can still hear the normal voice underneath with a slight delay.

So what about an analog setup? Rather than recording your voice and playing it into a speaker, is there a good way to build something that would alter the voice at the source, like speaking through a sinister kazoo? Something that would sound modulated, but without any electronics.

iPhone 4 or 4s with iOS 7, Rode Smartlav+ microphone, FiiO L9 adapter, and an Aker amp. Run RoboVox or Voice Synth Pro apps for voice changing. I think this is what everyone will be doing. Credit to Sni9er for this setup. Also join Knights of Ren on Facebook, lots of info there too.

Wow, thanks so much for the detailed information! This is very helpful!

Would this set up also help a woman's voice change? Said voice is low for a lady but still distinctly female.

I would think so - you'd just need to adjust the app to a deeper setting.

I bought a voice changer on eBay (China) and have had great results with it: https://www.youtube.com/watch?v=Dco-NrlHcAQ
Link to the item is in the description.