Dwyfor Tech Pas-Isel

Name: Pas-Isel
Brand: Dwyfor Tech

8 HP Eurorack module

A voltage-controlled low-pass filter with resonant feedback and self-oscillation.

Features

Self-oscillates as a sine-wave oscillator at close to maximum resonance, without an audio input.
Provides separate DC-coupled cutoff CV and volt-per-octave inputs.
Has an AC-coupled audio input with gain trimming.

Resonance— Sets feedback from the output to the input, creating resonance around the cutoff; near maximum it enables self-oscillation.
Audio Input— AC-coupled audio input, with level set by the Gain trimmer.
Audio Output— Filtered audio output; produces a sine wave when the filter self-oscillates.
Frequency CV Input— DC-coupled cutoff-frequency CV input, attenuated by the CV Attenuator trimmer.
V/Oct Input— DC-coupled 1V/oct pitch-control input for the self-oscillating filter.
Frequency— Sets the low-pass filter cutoff frequency from approximately 25 Hz to 25 kHz.
Gain— Trimmer that attenuates the AC-coupled Audio Input.
CV Attenuator— Trimmer that attenuates the upper Frequency CV Input.
V/Oct Calibration— Front-panel calibration trimmer for setting accurate 1V/oct tracking of the V/Oct Input.