The Electro Harmonix Micro Q-Tron has a filter wich is controlled by its internal envelope follower, analyzing the volume of your notes and the dynamics of your playing to directly sweep the filter's center or cutoff frequency. A stronger attack or louder note will produce a wider frequency sweep while softer playing produces more subtle effects. Use the Q control to make the effect more dramatic.
Electro Harmonix Micro Q-Tron Guitar Effects Pedal, Envelope Filter (code 60313)
Guitar Effects Pedal, Envelope Filter
£53.83 (inc vat)