Blue Cat's AcouFiend is an acoustic feedback simulator plugin from Blue Cat Audio that adds controllable feedback, or Larsen effect, to guitars, synths and vocals. It is available in VST2, AU and AAX formats for Windows and macOS.
Acoustic feedback is the howl a guitar makes when it sits too close to its amplifier. Blue Cat's AcouFiend recreates that effect inside a digital audio workstation, so it works at low volume and through headphones. The plugin lets you decide when feedback starts, which harmonic it rings on, and whether it is transposed. Because it is a plugin rather than a guitar-only tool, it can also be applied to synths and vocals.
AcouFiend gives you direct control over how the feedback builds and fades. You can adjust the rise and fall time, set how sensitive it is to changes in pitch and amplitude, and choose the generated harmonic.
You can limit the range of notes that are allowed to produce feedback, which keeps the effect focused on the part of the instrument you want. Feedback can be triggered on sustained notes or on chords.
The plugin supports MIDI control and automation, with MIDI Learn for mapping parameters. You can transpose the feedback signal to create harmonies, which is useful for sustained vocal parts and synth lines.
AcouFiend reports no latency, so it can sit in a live monitoring chain. Its processing shuts down when it receives silence, so it places no CPU load while idle.
Formats, systems and requirements as listed by Plugin Boutique. Missing details are left out, not guessed.
| Developer | Blue Cat Audio |
|---|---|
| Type | Plugin |
| Category | Distortion |
| Formats | VST2, AU, AAX |
| Operating systems | Windows, macOS |
| Architecture | 64-bit |
| Free trial | Yes |
AcouFiend is an acoustic feedback simulator plugin from Blue Cat Audio. It recreates the Larsen effect with user-controlled settings for when and how the feedback occurs.
AcouFiend is available in VST2, AU and AAX formats. It runs on Windows and macOS, and the macOS version is 64-bit only.
Yes. As a plugin, it can be used on synths and vocals to create feedback-style textures and sustained harmonies.
You need a VST, AU or AAX compatible host application. On Windows, Vista, 7, 8 or 10 with an SSE2-enabled processor is required. On macOS, version 10.9 or newer with an Intel or M1 Apple Silicon processor is required.
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