Before he knew about Vocaloids, Kyle was doing his own electronic vocals. What he does is record himself speaking the lyrics into the mic, and then use a vocoder to automate and pitch the vocals in post-production. It produces a result not dissimilar to a vocal synthesizer, but with his voice instead of a Vocaloid/Utau/etc's. Instead of forcing him to use a true synthesizer, we figured it's best to let him abuse his vocoders as much as he wants. He then uses this tool with other synths to make rock/metal music.