bass beat
hello
im not sure if you have figured out your project, but i stumbled upon your thread and thought maybe i could help...
attatched is a schematic of a guitar-led circuit. basically, the guitar is plugged into the input, and with every strum or pluck, the led comes on, and fades out as the note of the guitar fades out.
it's a pretty cool schematic i got from AudioGuru, and if you haven't figured out your project yet, this could be your first stepping stone towards it.
Hope I helped!