Kuvert from Klevgrand is an envelope shaper that draws five envelopes onto a grid to control effect parameters on looped material.
Kuvert at a glance
| Developer | Klevgrand |
|---|---|
| Type | Effects / Envelope Shaper |
| Formats | VST2, AU, AAX |
| Operating systems | Windows 7 or later, macOS 10.10 or later |
| Apple Silicon | Native |
| Free trial | Available |
| Price on Plugin Boutique (October 2026) | €34.71 |
What Kuvert does
The plugin lets a producer draw five envelopes freely onto a grid, and each envelope controls a different effect parameter. Among them, a low cut filter envelope and a high cut filter envelope add resonance, a glitch envelope alters timing, and a delay send envelope is tempo synchronized, with filter feedback as an additional target. The envelopes are looped, while incoming audio is not, unless the source material is itself looped.
Because the envelopes repeat, the plugin fits well into any musical context, and it is a practical way to revitalize loops such as beats. Kuvert is offered as VST2, AU and AAX for Windows and macOS. Crack, keygen and serial key queries for Kuvert are common, and the Windows build circulates as an x64 crack, with the macOS build packed as a .rar archive or a .dmg crack. The repack is also shared as a torrent and magnet link.
Key features
- Low cut filter envelope. An envelope drives the resonance of the low cut filter, so the filter response changes across each loop cycle.
- High cut filter envelope. A separate envelope drives the resonance of the high cut filter.
- Glitch envelope. One envelope alters timing, which places repeated stutter-like changes into the loop.
- Tempo synchronized delay send. A delay send envelope runs in tempo synchronized time and also moves the filter feedback.
- Freely drawn grid envelopes. Five envelopes are drawn freely onto a grid, and each one controls a different effect parameter.
Compatibility
Kuvert is available as VST2, AU and AAX for Windows and macOS, with native Apple Silicon support listed. Minimum systems are macOS 10.10 and Windows 7. A trial is available.
Kuvert compared with similar plugins
Ramp 2 from BeatSkillz is also an envelope shaper for Windows and macOS, offered as VST3, AU and AAX. Oxford Envolution from Sonnox is an envelope shaper for Windows and macOS in VST3, AU and AAX.
| Plugin | Developer | Type | Formats | Systems | Price |
|---|---|---|---|---|---|
| Kuvert | Klevgrand | Envelope Shaper | VST2, AU, AAX | Windows, macOS | €34.71 |
| Ramp 2 | BeatSkillz | Envelope Shaper | VST3, AU, AAX | Windows, macOS | €48.59 |
| Oxford Envolution | Sonnox | Envelope Shaper | VST3, AU, AAX | Windows, macOS | €242.96 |
Price and availability
Kuvert was listed on Plugin Boutique in October 2026 at €34.71. A free trial is offered. Prices change often, so the store page shows the current one.
Kuvert FAQ
Is there a working serial key or keygen for Kuvert?
Serial key and keygen searches are common for the plugin, and a serial crack is the string most often typed alongside the name.
Does Kuvert support Apple Silicon?
Yes. Native support for Apple Silicon is listed, and macOS 10.10 is the minimum system.
Which formats does Kuvert come in?
It is offered as VST2, AU and AAX.