there are tons of ways of using a vocoder or an autotune. autotuners get the vocals distorted beyond recognition if you manipulate them. example: Kid A by radiohead. thom is singing thru an autotune.
the first bits are clearly karl. the chorus, where he raises his voice, sound filtered and layered. if scribble has vocals layered, how about this track? maybe they're not scattered around, but placed in the same line to provoke distortion. like shielding the voice for the mood.
EDIT: rick used to sing when he was in freur
probably one of the craziest sights i have ever seen