Hi all
I'm very new to arduino and I am trying to incorporate some arduino magic into an electic guitar I am building.
Specifically, I want to use Arduino to control a grid of RGB LEDS. Moreover, I would like to adjust the inputs of the LEDS based on the output of the electric guitar signal.
For this case, I am looking for some sort of hardware/module/.. which lets me 'read' the electronic guitar signal before it goes via output jack to the guitar amplifier/speaker. I have drawn a crude schematic in paint attached to this post which sort of explains what I mean.
I would like to read variables such as Amplitude/frequency from the signal, for example to create the typical audio analyzer bars one sees on mixing panels 
.
Other possible application of the electric guitar signal could for example be using the readout to generate a variable 'intensity' which drives the intensity of the RGB LED display.
TL;DR --> I am looking for a way to read data from the output signal of my electric guitar before it is 'sent' to the guitar amp.
