Sweet Audio has recently released Scintillate, a free spectral reverb plugin for macOS and Windows.
Scintillate is also the winner of the KVR Developer Challenge 2026, which is a pretty strong recommendation on its own. We covered the KVR Developer Challenge 26 when it launched, and James also looked at some of the free synths and free FX plugins from this year’s lineup.
In short, Scintillate is a “spectral reverb sparkle engine.” It generates small spectral sparkles inside the sound of a more conventional reverb, so the result is not simply another room or plate algorithm.
If you use it at lower settings, Scintillate can add something that’s best described as a shimmering layer around a sound. It’s a tiny bit of extra movement that works well on pads, plucks, bells, and ambient textures.
If you push the spawn and decay further, it can move into huge walls of sound, swells, and other fun sound design stuff.
The density control is handy because it lets only the loudest sparkles through. That makes Scintillate more like a colorful spectral gate, which is definitely cool if you already have plenty of traditional reverbs.
You can also set the length to infinite, feed it a simple synth note, and Scintillate can hold onto the spectral material long enough to become an evolving pad source. Add a larger reverb after it, and you can get a lot of atmosphere from a very plain input sound.
Scintillate is the first release from Sweet Audio and also serves as a technical test for their house plugin framework before larger releases arrive later in 2026. The DSP was handled by Signalsmith Audio, while Sweet Audio took care of the rest.
Sweet Audio was founded by Marius Metzger, the developer behind CrispyTuner, which later became Brainworx bx_crispytuner under Plugin Alliance. The developer says Sweet Audio’s future paid plugins will use constant pricing instead of Black Friday-style sales.
Scintillate is written natively as a CLAP plugin, with VST3 and AU versions made using the open-source clap-wrapper. If your DAW supports CLAP, Sweet Audio recommends using that version for native parameter modulation and host undo/redo integration.
Scintillate is available for macOS and Windows in CLAP, VST3, and AU formats.
Download: Sweet Audio Scintillate (FREE)
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Last Updated on August 17, 2026 by Tomislav Zlatic.
