This is a work in progress
A DIY polyphonic guitar tuner pedal. With it you can check the tuning of all the strings with a single strum, saving you time when you need it most. Very useful for playing live!
The work has three main parts:
- A preeliminary study of the guitar signal to decide the best analysis technique for the pedal. This study was made in Matlab and the sources for the study can be found in the
- A software implementation of the polyphonic tuner to validate the algorithms prior to the hardware implementation. This code is written in Python and contained in the
- A hardware implementation (i.e. the pedal itself). The firmware for the device is stored in the
Polytuna Teensy Editionfolder. The schematics can be found in the Thesis document. The full circuit and the PCB KiCad project can be found at
Some pictures of the prototype:
(HD images can be found
The last completed step was the creation of a first PCB prototype, shown on the images, that's fully functional as a tuner. Currently the work is focused on improving the display software capabilities to ensure it's easily readable.
- Sergio Sánchez