Electro-Harmonix SMALL STONE Nano Phaser Shift PedalThe Small Stone Nano Chassis Pedal from Electro Harmonix is an analog phase shifter pedal which was first manufactured back in the early 70s and is for musicians looking for a fat, warm, analog phase shifter. This pedal has a Rate knob which adjusts the speed of the phasing sweep, and a Color Switch which changes the sound of the phase shift between a full and robust phase shift in the Down position to a more pronounced instance phase shift in the Up