Lese has released Strum, a "Sound Strummer", available as a VST3 / AU audio plugin.
Here is what they are saying:
Designed to make spectral delays easier to use, Strum splits your signal evenly and cleanly into a bunch of different bands, and then allows you to control the delay time & feedback of each band.
Strum can work either in "free" or "sync" mode, where in "sync" mode each individual band's delay time is synchronized to the tempo & time signature of your DAW, allowing for rhythmically-aware strumming.
Additionally, Strum provides a modulation panel for a bit more control of the delay times, allowing you to switch between "flutter" and "random" modes.
Strum is controlled by "factor bands" (control points) that alter all of the delay lines based on frequency. You can control the delay time, as well as the feedback with this system.
Price: 25 USD at lese.io. A demo version is also available.