voice changer

I’m looking to cosplay Kylo ren for the 501st and I need a boss ve5 rig at not a stupid high price like on eBay

If this isn't the right place to post this then please let me know where would be the best place to post this. Long story short I am just asking advice on how to best go about modding this helmet in order for it to be a co-void mask. So while I am good at cutting and creating new bands for the...