The Lark features a unique drive circuit with an interactive Overdrive control. With the overdrive set low you have a clean tone that just nudges the sound more towards a small combo. As you crank the overdrive things get hairy and sound big and punchy. Internally if you want to fatten things up there is a Body trim pot that lets you cut bass and sound more like a small amp, or keep things nice and full. There is also an internal trimmer for Presence to further shape the tone. The Tremolo circuit has a single external Frequency control that controls the speed of tremolo. The Tremolo is activated via footswitch and features an internal depth control to go from subtle to choppy.