Blue Cat’s AcouFiend is an effects plugin that simulates acoustic feedback, the Larsen effect, and lets producers shape it from the feedback itself.
Blue Cat’s AcouFiend at a glance
| Developer | Blue Cat Audio |
|---|---|
| Type | Effects / Distortion |
| Formats | VST2, AU, AAX |
| Operating systems | Windows Vista or later, macOS 10.9 or later |
| Apple Silicon | Native |
| Architecture | 64-bit |
| Free trial | Available |
| Price on Plugin Boutique (October 2026) | €78.34 |
What Blue Cat’s AcouFiend does
The plugin reproduces the howl that occurs when a guitar amplifier plays loud and its sound returns to the strings. Controls set how the feedback rises and falls over time, how sensitive it is, and how its pitch and amplitude change. Feedback can be limited to a chosen range of notes, so only those notes produce it, and the feedback signal can be transposed to create harmonies. The developer also states that the whole effect can be automated and controlled via MIDI.
Key features
- Note range limit. The feedback can be restricted to a chosen range of notes, so only those notes produce it.
- Harmonic transposition. The feedback signal can be transposed to create harmonies alongside the main feedback.
- Trigger control. The user chooses when and how feedback is triggered, including on sustained notes and chords.
- Crack, keygen and serial variants. Listings for AcouFiend often pair the name with keygen, serial key and iLok emulator searches.
Compatibility
Available as VST2, AU and AAX for Windows and macOS, with native Apple Silicon support listed. Minimum OS is macOS 10.9 or Windows Vista, and a trial is available.
Blue Cat’s AcouFiend compared with similar plugins
Blue Face by Audiority is an effects and distortion plugin offered as VST3, VST2, AU and AAX for Windows and macOS. Unlike AcouFiend, its format list includes VST3.
| Plugin | Developer | Type | Formats | Systems | Price |
|---|---|---|---|---|---|
| Blue Cat’s AcouFiend | Blue Cat Audio | Distortion | VST2, AU, AAX | Windows, macOS | €78.34 |
| Blue Face | Audiority | Distortion | VST3, VST2, AU, AAX | Windows, macOS | €19.84 |
Price and availability
Blue Cat’s AcouFiend was listed on Plugin Boutique in October 2026 at €78.34. A free trial is offered. Prices change often, so the store page shows the current one.
Blue Cat's AcouFiend FAQ
Is there a working serial key or keygen for AcouFiend?
Searches for AcouFiend commonly pair the name with serial key, keygen and activation code, and a repack is packed as .rar or .iso.
Does AcouFiend run on Apple Silicon Macs?
Native support for Apple Silicon is listed, on macOS 10.9 or higher.