UFO Filter

UFO Filter — Filter should be expressive, pulsating and alive. UFO Filter is a stereo plugin with advanced LFO modulation, real-time morphing between low-pass and high-pass, and rich analog-style saturation for evolving sonic movement.

UFO Filter is a powerful stereo filter plugin built around advanced LFO modulation

Its multi-waveform LFO modulates cutoff, resonance, and even morphs seamlessly between low-pass and high-pass filters, unlocking expressive and evolving sonic movement. With organic, tape-like saturation, tempo-synced rhythmic control, and wide stereo processing, it goes far beyond traditional filter plugins—delivering everything from subtle rhythmic modulation to aggressive, pulsating effects.

From drums, synths, and guitars to vocals and experimental soundscapes, UFO Filter transforms ordinary sounds into expressive, extraterrestrial textures in seconds. The truth is out there—and it sounds otherworldly.

Features

01 Filter

• A classic filter core, three ways
• At its heart is a versatile analog-style filter switchable between Low-Pass, Notch, and High-Pass, with resonance to emphasize the cutoff point up to the edge of self-oscillation. Simple, musical, and the foundation everything else in UFO Filter builds on.
• LPF, Notch, and HPF filter types, 20 Hz–18 kHz
• Resonance (Q) from gentle emphasis to self-oscillation
• Switch topology on the fly to reshape the tone instantly

02 LFO

• Motion for the filter, your way
• A flexible LFO engine modulates Cutoff or Resonance (Q) with five selectable waveforms, from smooth sine motion to stepped Sample & Hold. Sync it to the host tempo for rhythmic filter movement, or run it free for something looser and more organic.
• LFO modulates Cutoff or Resonance (Q)
• Five waveforms: Sine, Phasor, Square, Sample & Hold, Random
• Tempo-synced or free-running LFO speed

03 Drive

• Grit built into the filter path
• Drive adds saturation directly into the signal as it passes through the filter, layering in extra harmonic content and grit alongside the frequency shaping. Push it lightly for warmth, or hard for a dirtier, more aggressive character.
• Drive from subtle warmth to full saturation
• Harmonics interact with Resonance for added bite
• Works across the full Drive range, 0.1–7

04 Output & Global Controls

• Blend it, level it, bypass it
• A Mix control blends the filtered signal with the untouched dry path, keeping the effect as subtle or as extreme as the moment calls for. Output trim handles final gain staging, and a true bypass makes for a clean, fair comparison.
• Mix, 0–100% dry/wet
• Output trim, −20 dB to +20 dB
• True bypass on/off