Instructable at: https://www.instructables.com/id/ATMega1284P-Guitar-and-Music-Effects-Pedal/ I have ported the Arduino Uno ATMega328 Pedalshield (as developed by ...
Also refer to the Instructable. The Stomp Shield for Arduino from Open Music Labs use an Arduino Uno and four opamps as a guitar effects box. Similar to a previous design (also with an instructable ...
[Erik] wrote in letting us know that he just completed development of the Bobuino, a Arduino based on an ATmega1284. That chip is nice and beefy, most notably for having 16 KB of SRAM but it also ...