This Pedal is currently available.
Low Pass Filter
The Low Pass Filter pedal can be used for taming harsh high end such as fret buzz, string noise, and artifacts from other effects such as distortion pedals. It is also useful for simulating the high frequency roll-off of speaker cabinets. At it's most extreme setting, the Low Pass Filter can turn a bass guitar signal into a low end dub tone.
The low pass filter is a 12 dB per octave high frequency filter. The knob controls the cutoff frequency and ranges continuously from 15 kHz to 220 Hz.
The Low Pass Filter can accept 9 to 24 volts. Although 9 volts is sufficient for most applications, higher voltages will provide more clean headroom when using the pedal with line level signals.