Final Year Project - Electronic Guitar Tuner
Abstract
“Electronic Guitar Tuner” is an instrument to measure how well a guitar is tuned. It is an endeavor to make the tuning of guitar cost and power effective. This project is a microcontroller based project which aims to provide a user an opportunity to know whether the strings of his Guitar are well tuned or not. By having the previous knowledge of fundamental frequency of each string, the tuner is designed to inform the user about the tuning-status of guitar. The methodology used in the project comprises of three stages. In the first stage, it amplifies the guitar signal. In the second stage, it band limits the signal. This stage also determines the minimum sampling frequency required to prevent signal distortion from aliasing. In the final stage, sampling and analog to digital conversion of the analog signal takes place in a microcontroller. The microcontroller is also used to implement six different digital filters for each string of a guitar and for calculating the frequency of the string being tuned. The algorithm used to find the frequency counts the zero-crossings of the signal.
