King Spark is a 100% analog discrete core overdrive with tunable positive feedback." Indeed. This is a pedal for the adventurous and open-minded instrumentalist - not just guitarists. You've got a melding of overdrive (aggressive and raucous, mostly) with a wild CV filter. To quote Garth Yeaman (Mr. Whimsy Machine): " Think of it as a voltage controlled resonate filter from the synthesizer world and a tube screamer that are not just connected, but intertwined at their cores." Yep. Fun. Lots. You can control that filter with an expression pedal too. Somewhere in this video I hang a delay off it and it really takes off.