Published November 20, 2022 © CC BY-NC-SA

Realtime Voice Repitch and AutoTune with an Arduino UNO!

Wanna sound like a chipmonk, or just want to sing in tune? Then this may be the perfect project for you

IntermediateFull instructions provided2 hours636

Realtime Voice Repitch and AutoTune with an Arduino UNO!

Things used in this project

Hardware components

Arduino UNO

Resistor 10k ohm

Resistor 1k ohm

Through Hole Resistor, 20 kohm

resistor 100M ohm

SparkFun TRRS 3.5mm Jack Breakout

RGB Diffused Common Cathode

DFRobot EC11 Rotary Encoder Module

Capacitor 100 nF

6.8 nF Capacitor

10uF Capacitor

47 nF Capacitor

Software apps and online services

Arduino IDE

Story

Have you ever wanted to change your voice pitch in realtime with almost no lag? Sure there's software to do this on your phone and computer, but what about one of these Arduino thingies?

Well, we start this project by exploring how realtime reitching works:

And then once we have that working, we look into adding a form of AutoTune. The AutoTune algorithm works by identifying the pitch of the audio it hears and then uses the repitch algorithm to correct it to the nearest note: