Razor by After Later Audio is a dual Multimode filter, more precisely a true dual state-variable filter with sophisticated possibilities. The two filter units have the same design and can be used separately. It is possible to crossfade continuously from Lowpass via Bandpass to highpass, this is of course also possible via control voltage. Resonance goes into self-oscillation, but reproduces it a bit softer. The filter is followed by a controllable distortion, which can mutate continuously to Waveshaper . Depending on the signal fed in, hard to violent sounds are to be expected here at the latest. Five CV inputs per filter provide plenty of movement in the sound. Another highlight of this double filter is the signal routing, which uses the single outputs and the main output. It goes continuously from single/dual mono to parallel to serial, the latter reaching MS-20 qualities depending on the settings of the other parameters. For sounds in the stereo field you activate the shift button, now both cutoffs are controlled with one knob, the second cutoff acts from then on as an offset variant. From soft to hard and especially for complex sounds Razor is a successful combination.