tone control - SERP Analysis

https://en.wikipedia.org/wiki/Tone_control_circuit

https://www.idlethumbs.net/tonecontrol

https://tonecontrolshow.com/

https://goodhertz.com/tone-ctrl/

https://www.stewmac.com/video-and-ideas/online-resources/learn-about-guitar-pickups-and-electronics-and-wiring/how-a-tone-control-works/?srsltid=AfmBOorTtG33hQarO8_BYwXogWhB2Ool7HywJCE6ztmuw8uZNmhC1WnX

https://scientificguitarist.wixsite.com/home/tone-controls

https://www.reddit.com/r/audiophile/comments/86f8mt/amplifier_specs_what_is_tone_control/

https://guitarelectronics.com/dmt-dual-mode-bass-treble-guitar-tone-control/?srsltid=AfmBOoqKvBKwuBLDHNDmtcAmEGePMc3f0WSVJaNyDfxCRfrFb87z4FYM

https://bedlamguitars.wordpress.com/technical-info/tone-controls-capacitors/