Blue Cat's Plug'n Script

V3.61

Wed, 29 Apr 2026 00:00:00 +0200

Improved preset manager (now shows results while typing, full text search inside presets, improved performance...).
LoadUrl action: fixed wrong case in action id and connection issues when specifying port number (other than default) in the url.

V3.6

Tue, 03 Mar 2026 00:00:00 +0100

Scripting / Audio DSP

Private output params support (same as outputParams, but not exposed to host).
Script state persistency API to save the dsp script's internal state.
Fixed DSP script sometimes reloaded twice upon preset load.
Fixed rare "Internal error" popup messages upon loading the user interface under heavy memory load and many user interface scripts.
Fixed VST3 Instrument plug-in version not routing to aux channels properly in some host applications and sometimes producing white noise instead of silence.
Reduced CPU usage in DSP thread.
Fixed output strings corruption and random crashes when switching quickly between scripts that use different output string sizes.

User Interface

Added 20 new knobs styles, and 3 types of sliders for automatically generated user interfaces.
New scalable vector graphics for parameters groups.
New graphics for built-in analog meters.
Windows multitouch support (manipulate multiple controls at the same time with several fingers).
Export plug-in windows is now non-modal, fixing crashes when trying to export a plug-in while hosted in Logic Pro.
Reload script icon is back in the main toolbar.
Windows accessibility: native system widgets are now scaled according to text size settings on Windows 8 and newer in settings windows.
Minor Graphics optimizations for Hi resolution displays.
Improved user interface loading time on slow hard drives.
Optimized size of image resources for GUIs.
Fixed window opacity changes not shown in plug-in when host application modifies it.
Fixed selected text in text edit box sometimes not easy to read on Mac depending on the color scheme.
Fixed text edit boxes sometimes loosing focus when hovering mouse over other controls.
Fixed Mac installers not showing brand image in dark mode.
Fixed audio I/O selection not always appearing in audio/MIDI settings for exported standalone applications.
Fixed some exported plug-ins starting with no parameters upon launch.
Fixed 3D Views openGL issues on retina displays for recent versions of MacOS.
Windows: multiple GUI display and HiDPI performance improvements.
Windows: fixed context menu not always displayed in the right position when the window spans across several screens with different DPI.
Windows: fixed return key sometimes unexpectedly forwarded to host while typing in a text edit box.
Fixed revert current preset not always triggering undo properly
Fixed gradients not displayed properly on MacOS Tahoe when loaded in applications built with older versions of the MacOS SDK (Apple Bug)

MIDI Control

All plug-in parameters can now be controlled with MIDI notes, pitch bend, NRPN, 14-bit CCs, aftertouch or channel pressure, in addition to MIDI CC.
MIDI settings window can now be resized to display more parameters.
Optimized MIDI settings window display on Windows (load time and scroll).
MIDI Settings window now splits parameters into multiple pages for faster access.
MIDI Settings window now shows custom display names if any.
Optimized preset load upon MIDI messages when using several hundreds of user presets.
Fixed plug-in sending Bank number 0 when loading a preset that is not located in a bank.
Fixed audio dropouts when navigating presets via next/previous and plug-in set to send MIDI Program Change messages.

Standalone Application

Windows: ASIO driver now keeps running when ASIO Control panel is opened from the app audio preferences.
Windows: the application now follows ASIO driver buffer changes made in the ASIO control panel or external ASIO configuration app.
Performance: application now automatically selects the minimum number of I/O required from the driver.
Fixed audio dropouts when selecting MIDI output devices in preferences while using many MIDI devices.

V3.52

Mon, 08 Sep 2025 00:00:00 +0200

Fixed MIDI settings display issues on Mac.

V3.51

Tue, 12 Aug 2025 00:00:00 +0200

Fixed Audio Unit registration issues in Logic and GarageBand after using the demo version.
Improved whitespace stripping to streamline username/key registration.
New MIDI "learn once" mode for parameters (deactivates itself once learned).
App: fixed occasional crash when unselecting MIDI output devices while sending MIDI.
Mac App: fixed scrollbar not always appearing to select MIDI Input or Output devices.
Fixed userDocuments path empty upon first init in exported plug-ins.
Fixed Audio Unit MIDI output ignored by Logic on Apple Silicon processors in script mode.

V3.5

Tue, 06 May 2025 00:00:00 +0200

Projects can now be exported as standalone audio/MIDI applications.
SysEx MIDI events support (RAW Sysex data stream uses series of 4 bytes MIDI events).
Updated MIDI library scripts for SysEx support.
New MIDI Timecode and MIDI Clock generation scripts.
Updated MIDI log script with SysEx support.
Enlarged text fields in export window.
App can now receive and send MIDI even when no audio interface is selected.
App: it is now possible to adjust compression settings and activate UpnP for the Connector Slave network Audio Device.
Plug-in and App can now send Bank Select and Program Change messages upon changes in the user interface to keep in sync with external controller.
Find currently selected preset easily in the menu (folders containing the preset now display a check mark).
Added an option to cycle next/previous preset in current bank.
Improved performance of VST3 plug-in when receiving program change messages.
Fixed display issue with large output strings.
Fixed plug-in windows not resized upon zoom when statically set in the root SKIN tag.
Fixed application sometimes dropping local MIDI events when using the Network Audio Device.
Mac: fixed text edit box in the wrong position when closing / re-opening the user interface of the plug-in.
Fixed text edit boxes and buttons in export window not properly scaled when zooming UI.
Fixed system widgets with default size not properly scaled when using zoom in exported plug-ins.
Fixed CPU meter display sometimes off by one pixel.

V3.4

Mon, 09 Sep 2024 00:00:00 +0200

Windows: Multi monitor High DPI scaling support for high resolution displays (4K monitors, hi-res laptops...) for Windows 10 version 1607 (Anniversary Edition) and newer.
Mac: Improved Retina display support, with crispier graphics at all resolutions and zoom levels.
Fixed potential problems with other plug-ins changing locale settings in non-GUI threads.
Fixed input strings names reset to default when using angelscript for DSP (native was fine).
Fixed exported plug-ins creating a "Plug'n Script" folder in the user's documents folder.
Other minor bug fixes.

V3.34

Tue, 14 May 2024 00:00:00 +0200

Extended user interface programming capabilities with KUIML 2.7.4 support (User Interface programming language).
Scripting engine update, with improved performance.
Unlimited parameters: for plug-ins developers, you can now configure the number of i/o params and strings via a configuration file.
Offline processing status (non-realtime rendering) is now available from the processBlock function.
AAX plug-in now reports the recording status (in recent versions of Pro Tools that support it).
Fixed missing floatToString,intToString and uIntToString functions for dsp scripts on Apple M1.
AAX Atmos format is now available for exported plug-ins too.
Graphical user interface refresh performance improvements.
Improved resampling when the application starts streaming audio as a network server with Connector.
Fixed a couple of issues with undo/redo.
Ableton Live 11: Fixed VST3 MIDI input not detected.
Fixed drag and drop that did not work within a 2 pixels margin at the border of drag source widgets.
Fixed file drag and drop issues on Mac when using system::filepath applicative type.
Mac: Fixed negative values not properly sent to DSP when entering them in text box after double clicking on a knob.

V3.33

Mon, 12 Dec 2022 00:00:00 +0100

actual parameter names (as set in the scripts) should now be visible in automation lanes in most host applications (may require a session reload in some cases).
VST: improved parameter value display in some host applications.
The application is now using Apple's hardened runtime, and the installer has been notarized to avoid security warnings on Mac. You may have to add the --force option to code signing command line if you are signing your binaries.
Added Apple Silicon support for AAX plug-in format.
Added Ambisonic and alternate surround formats support for Pro Tools (Plug'n Script only: not yet for exported plug-ins).

V3.32

Thu, 23 Jun 2022 00:00:00 +0200

Single Installer on Mac (all plug-ins formats).
Full Apple Silicon (M1 processor) support.
New "network slave" mode to run as an audio/MIDI processing server for the Connector plug-in.
Windows: ASIO Control panel can now be launched from the audio settings window in the application.
Audio engine can now be restarted from the audio settings window in the application.
Dropped 32-bit support on Mac.
Now requires MacOS 10.9 and newer.
Improved MIDI events timing precision in the application.
Added MIDI tap tempo support for standalone application.
Standalone application can now send MIDI events to external devices.
Select individual MIDI I/O in standalone application.
In most plug-in formats, internal audio I/O configuration can now be selected regardless of the configuration defined by the host.
Improved MIDI & automation control settings with lock, reset and "save as global setting" capabilities.
The plug-in and app can now send MIDI events back to a control surface when MIDI-enabled parameters are modified in the user interface.
It is now possible to export plug-ins with an unlimited number of parameters.
The user interface does not throw errors anymore when using more than 48 input parameters in a script (they are simply not displayed).
Fixed latency compensation changes not always picked up by host applications.
VST3: fixed random crash in Ableton Live 11 upon load.
VST3: fixed parameters update issues in Studio One when bouncing tracks.
Windows: fixed an issue with unicode window titles.
MacOS: fixed export window colors in dark mode.
MacOS: fixed plug-in editor positioning issues in some hosts with some particular zoom values

V3.31

Tue, 16 Feb 2021 00:00:00 +0100

Arrow keys can now be used to navigate presets, in the main view or in the presets browser.
Next/Previous preset can now be triggered by MIDI CC commands.
New DSP workload meter in the status bar.
Smoother presets switching.
Improved smooth plug-in bypass.
Level meters do not use CPU anymore when the user interface is closed.
Many optimizations for faster GUI loading and reduced memory usage.
Improved performance for native DSP scripts.
Improved plug-in loading performance, especially when having many user presets.
Full Unicode support added to Windows platform.
New Experimental Xml parser/writer for Angelscript.
new KUIML actions to display presets or global settings windows: OpenPresetsSettings, OpenGlobalSettings.
KUIML errors can now be redirected to a log file (log_file_path directive in SKIN)
KUIML errors display in popup window can be disabled (show_messages="false" in SKIN)
window.loaded attribute is now properly set to false and sends events when the plug-in window is closed.
updated Angelscript filesystem object (fixes several issues with file dates).
VST3: fixed a GUI update issue when using automation and long buffers in Cubase (parameters values jumping).
Fixed an issue with random Audio Unit validation failures with exported plug-ins on MacOS older than 10.12.
Fixed transport info sometimes not properly initialized for exported plug-ins using native DSP.
Fixed an issue with endValues not properly set when using processBlock in exported plug-ins (Native scripts only).
Fixed crash when defining actions after using the content attribute in INCLUDE directive.
Mac: fixed intToString Angelscript function crash.
Mac: fixed GUI performance issues on native P3 displays and improved performance on other displays.
Mac: fixed mouse wheel that required large movements to change parameter values.
Mac: fixed mouse cursor flickering issues.
Mac: fixed Esc key not closing fine edit parameter dialog.

V3.3

Mon, 15 Jun 2020 00:00:00 +0200

Custom graphics and resource files are now be copied when exporting scripts as independent VST, VST3, AU or AAX plug-ins (SCRIPT_DATA_PATH folder).
New version of the KUIML GUI programming language (2.7), with new widgets, new mouse and keyboard events handling features, system script function to execute shell commands and more.
New version of the Angelscript Engine (2.34).
New high resolution graphics for knobs.
New background mode ("None") to create entirely custom user interfaces.
New icon for the Plug'n Script Application.
Reduced disk footprint.
Fixed crash in exported VST3 plug-in when using input strings in scripts.
Fixed crashes when using build-time script in KUIML widgets.
Fixed gui.capture objects that could be exposed twice in KUIML objects.
Fixed png or svg images alpha mask not properly loaded (was ignored)
Fixed ignore_missing attribute for LOAD_FONT that still triggered an error.
Mac application now fully supports dark mode on Mac OS Mojave and newer.
Mac: fixed settings panel rendering issues in dark mode on Mac OS Mojave and newer.
Mac: Fixed keyboard not responding in registration panel in some host applications (LUNA, Garage Band...).
Mac: Fixed demo version that could hang Logic when reloading projects using the plug-in.
Mac: fixed Retina scaling issue on buffered widgets in apps built with Mac OS 10.14 SDK and newer.

V3.2

Fri, 30 Aug 2019 00:00:00 +0200

DSP script can now be encrypted upon export.
DSP script can now define output strings to share any kind of data with the user interface.
Export plug-in in AAX format for Pro Tools and Media Composer (for registered AVID developers).
New presets browser with built-in search (also available in exported plug-ins).
New version of the KUIML GUI programming language: drag and drop, canvas widget, build time scripting, lazy loading and more.
New oscilloscope sample script (output strings feature demo).
MIDI Program Change preference is now saved into session instead of global preferences, so each instance can now use different MIDI channels. It is also saved in the user default preset.
VST3: added program change support for VST3 plug-in format.
VST3: added MIDI output support for VST3 plug-in format.
Faster GUI rendering on recent Mac OS systems (up to 5x faster on level meters).
Improved GUI loading time when using many widgets.
Fixed an issue with MIDI control that did not always work properly when the plug-in GUI was open.
VST: the user interface is now properly resized in Cubase on Windows.
Improved plug-in and app listing in Windows 10 start menu.
Fixed wrong value set by SetProgram function in built-in MIDI library.
Fixed built-in library not always copied to user documents folder.
Fixed scripts menu order on Mac OS Sierra and newer.
Fixed: native widgets in custom user interfaces used to be visible before the layout was done.

V3.1

Fri, 30 Nov 2018 00:00:00 +0100

Now available as a standalone application.
Export plug-in in VST3 and Audio Unit plug-in formats.
Faster graphical user interface loading.
New version of the Angelscript engine (2.32) with improved performance and new add-ons (datetime, filesystem).
Last loaded preset is now remembered in session and displayed in the presets menu.
Plug-in state can now be reverted to the last loaded preset.
Improved scalable graphics for icons and buttons.
Dropped support for legacy RTAS and DirectX plug-ins formats.

V3.01

Thu, 19 Oct 2017 00:00:00 +0200

Fixed: VSTs exported for Mac were not properly detected by host applications.

V3.0

Tue, 17 Oct 2017 00:00:00 +0200

Brand new GUI design, with improved usability and touchscreen support, fully zoomable.
Scripts can now be exported as independent VST plug-ins.
Customize the user interface in the plug-in (no code required), or write your own layout for each script.
Separate player and editor modes for optimal workflow.
Parameters display format can now be set by scripts.
Retina displays support on Mac (high resolution for text and vector graphics).
Changed demo limitations: up to 5 instances allowed, bypass time changed to half a second, and bypass parameter is not affected anymore.
New installer on Mac.
New version of the Angelscript engine (2.31.1).
Fully compatible with previous versions of the plug-in.
Warning: changed the identifier of the VST3 version on Mac. See this post for more details.
Fixed minor issues on Mac OS High Sierra.
Fixed native file recorder script issues (file names were not properly generated for rotation).
Fixed MIDI channel issue with VST3: MIDI channel for note events was offset by one in the VST3 plug-in version.
Removed specific mono and stereo versions for the VST plug-in - please unintall previous versions first if you do not need them (new installer will not remove them).
Dropped support for Windows XP and Mac OS X 10.6 and earlier.

V2.1a

Fri, 04 Mar 2016 00:00:00 +0100

(VST only) Fixed a crash when loading the VST version in Ableton Live.

V2.1

Thu, 03 Mar 2016 00:00:00 +0100

VST3 plug-in format support, with improved external sidechain compatibility for Cubase and Nuendo.

V2.0

Wed, 25 Nov 2015 00:00:00 +0100

External side chain and auxiliary outputs support (up to 16 audio outputs).
Native C/C++ scripts support for optimal performance and flexibility.
KUIML 2.0 user interface language support to build custom user interfaces, with additional scripting capabilities.
New DSP scripts, delivered with full angelscript and C++ source code.
21 new custom skins included.
User documentation (html or pdf) can now be added to scripts.
Custom skins can be selected directly from the main menu.
Presets can now be selected using MIDI Program change and bank select messages (can be activated with the presets menu/MIDI Program Change item).
Last loaded preset can now be saved directly from the presets menu without having to select the file.
VST: fixed latency compensation reporting in Cubase (no need to re-enable the plug-in to update the latency anymore).

V1.1

Wed, 01 Oct 2014 00:00:00 +0200

Audio Unit can now be loaded as a MIDI effect in Logic Pro X.
The user interface now displays switch buttons for boolean parameters instead of knobs.
Discrete parameter values can now be selected from a dropdown menu.
New API: scripts can now use plain strings as user input.
New API: scripts can now read and write files.
New scripts and presets: added audio player and recorder scripts and a wave file utility class.
Developers can now share their scripts on a dedicated GitHub repository.
Fixed: implemented pass-thru for MIDI events when no processing function is declared (default script for example).
Fixed: Audio Unit Synth version did not appear as an Instrument.
Fixed: script was reloaded when starting playback in Reaper, and the effect was not applied immediately.
Fixed: RTAS version could freeze Pro Tools 9 and earlier at startup.

V1.0

Thu, 18 Sep 2014 00:00:00 +0200

First release.