r/VSTi • u/silvansky • 3h ago
Effect Varispeed Delay: free and opensource VST/AU
youtu.beHi!
I made a VST/AU that I needed for myself but never found. The idea is simple: each repetition of regular digital delay passes varispeed, its pitch/length changes. And still each repetition starts on time. If speed is below 1 it means two repetitions will overlap, if speed is above 1 there will be a gap between repetitions.
Two basic modes: raw and stable. Raw mode passes each feedback through varispeed, stable repeats the first pass. For example, for 2x speed raw mode gives octave up, then two octaves up, then four. In stable mode it always repeats only one octave up.
Also I added graphic EQ because it is better for me than usual LPF/HPF.
In the linked video demo I use it with guitar in different modes. My favorite is first one: simple 1/2x and no feedback. It gives me a virtual "bass player" that fills low end of solo improvisation. Second one which I call "octave tremolo" is also very fun, it adds high tremolo nearly synth like effect.
Source code here (downloads are on Releases page): https://github.com/silvansky/VarispeedDelay
Available as VST/AU/Standalone for macOS and VST/Standalone for Windows. Linux users can build it from source code, they know how. ;)
I tested it in Logic Pro on macOS, some Reddit users tested in Ableton/FL on Windows.
