How Do "Voice Changers" Work?

The vast majority of voice changers shift the pitch-sensitive fundamental waves of the user's voice via microprocessor and offer various pitch shift options. Less costly models offer fewer options and use a less effective microprocessor than more expensive models. Since pitch is only one element of the human voice, there are limitations as to how much change can be made without resulting in an "unnatural" or "digital" sounding voice. High end (pro) models use additional electronic circuits to offset or buffer the unnatural sounds as well as more efficient pitch shifting microprocessors . Lower end models are generally purchased as novelty items for practical jokes or for kids, whereas higher end models are best for professional applications.