

It has a built-in rechargeable battery, a line-in socket and came with two microphones. I bought a “N74” portable amplified voice speaker from for £20. There are lots of alternatives but it’s hard to know how compatible they are with the Pi. It has a standard USB plug, 3.5mm microphone jack and a 3.5mm headphone jacks. Inside there is a really bright red LED which I tamed with some electrical tape. M y USB sound audio adapter dongle thingee was a “C-Media Electronics Inc CM108 Audio Controller”. It all work so this post is presented for anyone who wants to do something similar and may find these steps useful. For my project I decided to use the Raspbian Lite and a Pi Zero W. I collected the hardware and followed in Dave’s footsteps. The system uses SoX to record sound via a microphone, distort it and then send to an amplified speaker.

This looked like something I could integrate into our lovingly constructed bounty hunter helmet. While researching possible upgrades for my son’s Star Wars Bounty Hunter costume I came across an excellent blog post by Dave Shevett over at on using a Raspberry Pi to create a voice changer for a halloween costume.
