Sweep
Key Features
- Creates the perception of endlessly rising or falling motion with a moving peak and notch filter bank.
- Uses draggable factor-band curves to shape the filter bank with an EQ-like visual workflow.
- Runs up to 16 filters per channel and can distribute them between logarithmic and linear spacing.
- Allows independent left and right filter movement for more elaborate stereo sweeps.
- Adds controllable fractal-noise drift through Random, Phase, and Complexity controls.
- Supports BPM-synced speed and input or external-sidechain control of the sweep rate.
- Provides a vectorized, resizable interface for current Windows and macOS plugin hosts.
Description
Sweep is an infinity-filter effect from Lese that uses moving peak and notch filters to make audio seem to rise or fall continuously. It is built for pronounced motion rather than corrective EQ, turning pads, drums, basses, and transitions into shifting, resonant textures.
Its factor-band handles work like a compact graphical EQ, but they shape the amplitude contour of the underlying filter bank instead of directly equalizing the signal. Up to 16 filters per channel can be distributed across the spectrum, while Q, Q Bias, Log/Lin, speed, and mix control the density, sharpness, movement, and blend.
Sweep can unlink its left and right channels for wider, less predictable stereo movement. A smooth fractal-noise system adds drift to the filter frequencies; Phase selects where that motion occurs and Complexity determines whether it evolves gently or in more jagged detail.
For repeatable arrangements, the current version also offers BPM-synced speed, and its Speed control can be driven by the input or an external sidechain. Lese distributes Sweep through its dedicated product page as a $0 email-gated download, with current Windows VST3/AAX and macOS VST3/AU/AAX support listed there.
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Frequently Asked Questions
What kind of effect is Sweep?
Sweep is a Shepard-tone-style infinity filter. It moves multiple peak and notch filters through the spectrum so audio can seem to keep rising or falling rather than simply opening or closing one cutoff filter.
Can Sweep create stereo movement?
Yes. Its left and right filter banks can be linked or controlled separately. Unlinking them lets the two sides move differently for more complex stereo motion.
How can I keep Sweep aligned to a song?
The documentation describes a BPM-sync mode for setting how many bars a filter movement takes. You can also right-click the Speed control to use the input or an external sidechain signal to affect its rate.
How do I get Sweep from Lese?
Lese's Sweep page presents an email form for the $0 download and states that it will email links to Sweep and Codec. The listed downloads support VST3 and AAX on Windows, plus VST3, AU, and AAX on Intel and ARM macOS.
