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Randy Sarafan writes:

This is a simple to build device that converts your own human voice into a superior robot voice. It also includes a number of sweet features like an audio-in jack so that you can plug in all of your favorite instruments, microphones and music players, a vibrato mode and awesome pitch shifting buttons. It can be shifted two whole octaves in either direction. This provides for endless hours of fun (at the expense of everyone around you).

I can’t wait to hear the new tunes Randy’s going to make with all of his recent fun audio projects.


Becky Stern

Becky Stern is head of wearable electronics at Adafruit Industries. Her personal site:



  1. Vinny says:

    If someone knows how to make a circuit like that but modulating your voice to sound like Darth Vader, let me know. :D

    1. SteveC says:

      Darth Vadar’s voice is that of James Earl Jones. it’s not electronic. However, if you record yourself doing your best Darth Vader impression, then change the pitch downwards with audacity or similar software, you might be able to get a passable Darth Vader sound. (I’m assuming your voice, like that of most people, isn’t as deep as James Earl Jones’ voice.)

      There are real-time pitch shifters, (e.g. Digitech Whammy pedal) though they tend to have more artifacts than non-real time software shifters, and I don’t know of any portable, battery operated ones, though they might exist.

      1. nunchuk jones says:

        I remember one of my friends having one that was built into the Vader mask of his (store-bought) Halloween costume. I can’t recall how well it worked.

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