Dragonfly Plate is a free mono-to-stereo reverb plugin based on NVerb and STRev from Freeverb3 VST.

User Interface


Dry Level

Level of the input signal sent to the output

Wet Level

Level of the reverb signal sent to the output

The output of the Dry and Wet controls are combined to form the reverb’s output signal. Note that sliders are not controlled by the presets. This allows you to set the levels in a way that works for your project, and then explore different presets without the sliders changing.

Preset Browser

The Preset Browser section presents a variety of plate and tank presets that set the reverb type and the dials.

Reverb Type

The Reverb Type section presents three different plate reverb algorithms:


This thin plate algorithm is a derivative of CCRMA Nrev. It has a sparse tail and some slight early reflections.


This thick plate algorithm is a modification of the Simple Allpass algorithm with a dense tail and no early reflections.


This algorithm is based on the reverb effect described in Jon Dattorro's AES article

Although a preset will automatically select a Reverb Type, another algorithm can be selected after picking a preset to hear how the alternative algorithm sounds with the given dial settings.


The spectrogram has been included to give a better idea of how the various reverb parameters affect the plugin’s output. The spectrogram is rendered by simulating a burst of white noise through the reverb algorithm with the current settings, and then processing the output with a fast fourier transform algorithm.

Clicking on the “?” displays the plugin name, version, license, and credits.


Note that holding the Shift key and clicking a dial will reset the dial to the default for the current preset.


Output stereo width.


Delay before the onset of the reverberation.

Length of time for the late reverberation to decrease by 60dB.
Low Cut

A high pass filter applied to the input signal before processing the reverb algorithm.

High Cut

A low pass filter applied to the input signal before processing the reverb algorithm.


A low pass filter applied to the reverb algorithm's feedback loop.