So this started off as an addendum to my piece on Guitar Pedal Tone Control Alternatives, but then very much became an article in its own right, and now precedes the article it was supposed to be a part of. The majority of guitar pedals usually have one or more tone control dials or switches to amend / tune the tone of said pedal. I started looking at different forms of tone control, before investigating what in fact were the key frequencies for electric guitar, and how was it best to control ...