Pigtronix Resotron is a multi-mode filter that brings the analog sounds of 70’s era synthesizers to the world of envelope pedals for guitar, bass and beyond. Resotron is the first envelope pedal that can be made to follow the pitch of the notes you play. This pitch-following ability causes the filter to move around based on what notes you choose to play, just like an old-school analog keyboard synthesizer. UP and DOWN envelope modes are also included to perform the more traditional, velocity-sensitive filter movement that responds to how hard you hit the strings.
A push-button OSCILLATE function turns the Resotron into an analog synthesizer pedal. This mode shorts out the PEAK knob, effectively setting it to 100% while simultaneously activating a voltage-controlled amplifier (VCA) in the output stage. With the OSCILLATE function turned on, the CUTOFF knob sets the tuning of the synth effect while the VCA instantly follows the volume of your input signal. The synthesizer sounds created by the Resotron can also be radically altered by switching between the LPF, BPF and HPF modes, each of which has its own distinctive waveform and modulation characteristics when overdriven by the on-board compressor.