Blue Cat AcouFiend
Blue Cat's AcouFiend is an acoustic feedback simulator plug-in that can make your guitars scream, growl, or sing, even at low volume or through headphones, and it gives you total control over it!
AcouFiend simulates the acoustic feedback (a.k.a "Larsen effect") well known to guitarists playing loud and close to their speaker... Except that here, you have total control over the effect.
You can choose when and how to trigger the feedback, on sustained notes or chords. The plug-in lets you select the main harmonic of the feedback, and you can even choose to transpose it for more creative effects.
Of course, it can be entirely automated or controlled via MIDI.
And since it is a plug-in, it is not just for guitars: create screaming synths, sustained vocal harmonies and more...
Blue Cat Audio Standards:
Available in most plug-in formats for Mac and Windows.
Full MIDI control and automation support, MIDI Learn.
No CPU load on idle: processing shuts down when fed with silence (optimal CPU usage).
Customizable user interface with transparency & zoom.
Smooth Bypass: noiseless plug-in activation / deactivation.
Undo/Redo.
Full featured integrated presets manager.
Copy/paste the state of the plug-in between instances.
Any sample rate supported.
Version 1.12
Added Apple Silicon support for AAX Plug-in Format.
Fixed VST3 version not always loading properly in Ableton Live 11.
Improved VST parameter value display in some host applications.
Added an option in global & preset input settings to send MIDI events when MIDI-enabled parameters are modified in the plug-in (to update control surfaces accordingly).
Improved undo management and automation when using the mouse wheel to move knobs.
AAX: Fixed erratic mouse behavior in Pro Tools on Mac.
Mac: installers and plug-ins have been notarized to avoid security warnings on Mac OS Catalina and newer.
Windows: Multi monitor High DPI scaling support for high resolution displays (4K monitors, hi-res laptops...) for Windows 10 version 1607 (Anniversary Edition) and newer.
Mac: Improved Retina display support, with crispier graphics at all resolutions and zoom levels.
Mac: fixed random GUI refresh issues in Reaper on Retina displays.
Download Link