Raspberry pi guitar tuner hardware & equipment: tuner is using 15 leds (7 red (lower half) + 7 red (upper half) + 1 green (center)) for displaying frequency and 7-segment display for displaying the matched note (dot in the bottom-right corner signifies a sharp note e.g.. Pedal pi - raspberry pi zero guitar pedal. pedal-pi is a lo-fi programmable guitar pedal that works with the raspberry pi zero board. the project is totally open source & open hardware and made for hackers, programmers, and musicians that want to experiment with sounds and learn about digital audio.. Today i wanted to post an article about my raspberry pi based guitar effect box. here we go: this project, as mentioned previous, is a guitar effect unit based on and powered by a raspberry pi "micro-computer" and the free dsp software "pure data"..
