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TutorialPros and cons
November 04, 2025

Pros and Cons

It’s difficult to compare Plug'n Script to other software because it’s quite unique. Some tools share a similar concept of writing DSP processing in scripts, such as VST Pascal Script by Christian W. Budde, but they don’t come close to the capabilities of Plug'n Script.

To be fair, let’s try to list the strengths and weaknesses of Plug'n Script.

Pros:

  • If you’re new to the DSP world, you can get started quickly. If you’re an experienced developer, you can prototype plugins much faster.
  • No need to close and reopen the DAW after every plugin build; processing reloads "on the fly."
  • A good collection of factory scripts to start with and learn from.
  • Very fast generic GUI customization (select colors, controls, and you’re done).
  • You can create your own GUI from scratch using KUIML, and it will work on both Windows and Mac.
  • If you’re using AngelScript, you can create plugins for Mac without needing a Mac.
  • AngelScripts, compared to C++, barely can crash your DAW if you make a coding mistake, making it ideal for beginners.
  • Once your AngelScript version works well, you can port it to a native (C++) version using the same DSP API, ensuring your plugin runs as fast as regular plugins.
  • Plug'n Script works as a plugin or standalone application on both major platforms (Windows, macOS) and supports all major plugin formats (VST, VST3, AAX, AU). You can export your plugins to all these formats as well as create a standalone audio application.
  • A solid underlying framework, backed by over 20 years of Blue Cat Audio experience.
  • Many features are already handled by Blue Cat Audio, so you don’t need to worry about them: saving and loading presets, undo-redo, metering, MIDI control linking, plugin format and OS-specific details, data model communication, basic GUI skinning, and much more. This allows you to focus on the DSP part.
  • Supportive and responsive developers. You can get helpful answers on the Blue Cat Audio forum and even request new features.
  • You can sell your plugins (for VST, you need to sign a VST3 agreement with Steinberg, and for AAX - with Avid). But no need to sign anything with Blue Cat Audio.
  • Plug'n Script is continuously evolving and improving.
  • A third-party, highly customizable skin and KUIML library by LetiMix.

Cons:

  • Plug'n Script is closed-source and proprietary software. If something happens to the developer, it may become impossible to get bug fixes or further improvements.
  • You’re limited to the provided features. If something is missing in the DSP API or KUIML core, there’s not much you can do (though this can sometimes be a good thing).
  • Slightly restricted DSP-to-GUI communication (no binary data sharing yet).
  • Exported plugins cannot be encapsulated in a single DLL (on Windows); instead, they consist of a DLL (10+ MB) and a data folder.
  • KUIML can be tricky to work with for certain tasks.
  • The community is still relatively small, and there’s a lack of tutorials and examples.
  • You might find yourself spending most of your time developing new plugins instead of focusing on other important aspects of life.

 

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