The Night Wire takes the traditional harmonic tremolo a few steps further by allowing the center point of both filters to be adjusted for different tones. The filter frequency has three modes: Manual, LFO and Attack. In Manual mode, the center point can be set to a fixed position with the frequency control. In LFO mode, the filters are continuously swept and the frequency control adjusts the speed. In Attack mode, the filters are dynamically swept according to pick attack and the frequency control acts as a range control, much like a standard envelope filter.