Kuvert - Swedish Envelopes 4+

Klevgränd produkter AB

    • 3.8 • 17 Ratings
    • $7.99

iPad Screenshots


Kuvert allows you to draw five different envelopes. These envelopes control different effect parameters, and can be drawn freely or onto a grid. The envelopes are looped, while the incoming audio isn’t (unless you’re feeding it looped material of course). This is a powerful & fun way of altering your sounds to a whole new level, sometimes not even recognizable! Thanks to the looping nature of the plug-in, it will fit very well into any musical context. One way of using it would be to revitalize any looped material within a few seconds.

Noteworthy features:

• Volume envelope
• Low cut filter envelope (with resonance)
• High cut filter envelope (with resonance)
• "Glitch" envelope (alters timing)
• Delay send envelope (with tempo synchronised time, filter and feedback
• IAA (With tempo sync if host sends it)
• MIDI clock sync
• Load / Save presets
• Audiobus
• Documentation (on the product web page)

Check out the product web page for a video demo.

Feedback or suggestions? Drop us a mail: support(at)klevgrand.se or @klevgrand on Twitter

What’s New

Version 1.0

This app has been updated by Apple to display the Apple Watch app icon.

Ratings and Reviews

3.8 out of 5
17 Ratings

17 Ratings

Strizbiz ,

Could be a 5 star app

If this were an audio unit it would be one of the apps I’d use the most, but it’s not and I never use it, I bought the IPad version because I tried the desktop demo and thought I could use it as an audio unit like with the desktop version, guess I should have been more thorough when reading the description for the iPad version. If I’m being honest, not making this an audio just isn’t smart at all.

qwesterish ,

Updated review

This app works great now as IAA. This would be top notch as an au.

Request to developer, please implement a gate mode triggered by midi notes.

djAlpad ,

Tempo based wackiness

This is a great tool for filtering and twisting live and recorded audio. I am in love with the time/pitch stretch feature! Give that added bit of analog wobble to your music... Just give it a try. Worth every penny

App Privacy

The developer, Klevgränd produkter AB, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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