Plugin interface — screenshot pending
Multi FX

Fault

Unfiltered Audio

Fault is a stereo spectral shifter that combines pitch shifting, frequency shifting, and modulation into a single multi-effects plugin. It can subtly enhance tracks or radically transform audio through frequency-modulated effects, dual-channel processing, and cross-channel feedback. With its flexible modulation system and six feedback paths, Fault excels at everything from transparent pitch correction to extreme sound design and creative synthesis.

Key Features

01Dual-channel Pitch Shifters with ±1 octave range and 0.1 semitone steps
02Stereo Frequency Shifter with internal FM synthesis (Linear and Exponential modes)
03Six customizable feedback paths (3 for Shifter, 3 for Delays) including cross-channel feedback
04Six modulator types: Sine/Sawtooth/Triangle/Square LFOs, Input Follower, Sample-and-Hold Noise, Macro Control
05Dual independent delay lines with tempo sync and cross-channel feedback
06Ring Modulation mode for metallic and tremolo effects
07Variable sampling rate control over entire DSP engine
08Mid/Side processing with stereo width control and M/S output option

Things to Try

  • 01Use cross-feedback between the two delay lines set to different lengths for huge stereo echoes
  • 02Turn off Stabilize mode and modulate the shifter frequency and delay times to create synthesized tones and bird-like sounds
  • 03Enable Ring Mode with Anti-Alias disabled, set shifter to low frequency (0.5-10 Hz), and adjust Spread and FM Depth for wide stereo tremolo

Own Fault?

Add it to your Plugin Library and it stops being a name in a folder — search it by sound, keep notes, and remember why you bought it.

Add to My Library

Free to start · no credit card

Already have an account? Sign in to add it

Similar plugins to explore

Get more out of the plugins you already own

Track your plugins and instruments, search by the sound you need, and learn what each one is for. Free forever for up to 100 plugins and instruments.

Get Started Free
Fault by Unfiltered Audio | Plugin Library