Arduino Based Automatic Guitar Tuning System

Acoustic guitar is one of the best known and most commonly used musical instruments. It emits sound waves because the guitar player makes the strings oscillate. In order to function properly, i.e. emit the sound of the appropriate frequency it is very important the tension in each string is adjusted regularly. This process is called tuning. It is usually done manually with a help of universal tuner. In this paper an automatic guitar tuning system is presented. It is based on the Arduino platform. It uses a microphone to record the sound, calculates its frequency and then turns the tuning pegs on guitar head with stepper motor to get the correct frequency.