Naive LPF

Naive LPF

by Admiral Quality
by Daniel Strongin

Naive LPF is a resonant low-pass filter with envelope follower. It has been developed to closely model the way some real world analog circuits work, as opposed to some other techniques which, while well adapted to the math processing power of a computer, just don't seem to render the same organic feel. Not to say that those techniques aren't just as valid, but Admiral Quality was aiming for a vintage, analog feel with Naive LPF.

NOTE: Its creation is primarily as a test-bed for a full soft-synth Admiral Quality have planned.


  • Cutoff Frequency: Continually variable, from far above the sample rate of your host down to 0 Hz.
  • 4 Stages: Selecting the number of Stages adjusts the cutoff slope of the filter. More stages make a steeper slope.
  • Resonance: Enhances frequencies near the cutoff by feeding the inverted output signal back into the input. The resonance can be set high enough that this filter will enter self-oscillation and produce very loud signals, even without any input signal present.
  • Envelope Follower: Vary the cutoff frequency in response to the dynamics of the input signal, creating "auto-wah" type effects. With Attack and Release controls.
  • HPF Mode: Subtracts the low-pass filter's output from the original input, providing a high-pass filter effect.
  • Output Saturation: Reduce excessive peaks back below 0 dB.
  • 6 input / 6 output channels. Each channel has its own independent filter with envelope follower.

Latest Versions:

PC: 0.6



Daniel Strongin
San Francisco

Daniel is a caffeine dependent, entrepreneur, music producer, sound design junkie, and world traveler crazy about teaching modern electronic music production through his site SoundShock. You can get in contact with him at

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