3 Leaf Audio’s Chromatron, a ‘state variable filter’ is now available in the UK. The latest from US pedal specialist Spencer Doren, the Chromatron has been ten years in the making. 3 Leaf describes the pedal as: ‘…an optically-controlled analog filter that can switch between envelope control and manual control via expression pedal with the push of a button. The envelope detector is an original design, producing a musical filter response that spans a broad range of tones from vintage quack to future-synth psychedelica’.
According to 3 Leaf, the Chromatron’s control set offers precise control over the tone and response of the filter. The mode footswitch toggles between envelope control and the expression pedal input, so that the Chromatron can act as both an envelope filter and a wah. An integrated effects loop allows the user to use ‘dynamics-killing fuzzes and overdrives while retaining a smooth and consistent response from the envelope detector. The response knob has a wide input range that accommodates everything from the loudest active bass to a vintage Strat’.