OSC-1
A complete synth built from separate modules.
AvailableEffect
Filter
A resonant low-pass filter for shaping tone.
A stage of OSC-1. It works the same on its own page as it does in the chain, same parameters, same paths.
About
A resonant multimode filter - low-pass, high-pass, band-pass, notch - with an envelope contour. Nothing else in a subtractive synth changes the sound this much per degree of rotation.
Presets
Start from a named sound, then adjust the instrument to make it yours.
InitDefaultAcid SweepSlow OpenWahHollow OutPhaser Notch
Signal graph.
ExperimentalA sketch of the signal path, in the order of the parameter groups.
How it works.
A second-order biquad in one of four modes. Cutoff sets its corner and Resonance sets the Q, which is emphasis at that corner rather than a separate resonance circuit - a real analogue ladder behaves differently at the extremes, and this does not pretend otherwise.
The contour is its own ADSR, separate from the amplitude envelope, sweeping from Base Freq upward by Env Octaves. That separation is the difference between this and OSC Mini, where one envelope does both jobs.
Goes well with.
Oscillator
Two oscillators with independent pitch, level, and stereo position.
Envelope
Four controls for plucks, pads, and everything between.