https://forums.steinberg.net/t/vst-3-8-0-sdk-released/1011988

Steinberg Forums

VST 3.8.0 SDK Released

Developer VST 3 SDK
vst3sdk-announcement
Yvan October 21, 2025, 2:32pm 1

VST 3.8 SDK Released

Dear VST Developers,

Steinberg Media Technologies today releases the VST SDK 3.8

Here's a brief overview of changes:

---------------------------------------------------------------------

 Version 3.8.0 (2025/10/20)

  * New licensing model for VST 3:

      + VST 3 is now open source, released under the MIT license.
  * Interface changes:

      + Support for MIDI 2.0: new interfaces IMidiLearn2 and 
        IMidiMapping2. These new interfaces replace the previous
        interfaces IMidiLearn and IMidiMapping.
      + Add missing ControllerNumbers enum for MIDI 1.0 System
        messages.
      + Preview Wayland support on Linux (originally written and
        contributed to VST SDK by PreSonus Software Ltd. and
        integrated in Studio One Pro 7.2 and higher on Linux):
          o new interfaces IWaylandHost, IWaylandFrame.
          o new Platform UI Type: kPlatformTypeWaylandSurfaceID.
  * VSTGUI update 4.15.0

      + new **Task Concurrency API**: It facilitates scheduling tasks
        for execution on background threads, either concurrently or
        sequentially. This API also enables the scheduling of tasks
        on the main thread from any other thread.
      + add support for custom view layouts (see **IViewLayouter**
        and **CViewContainer::setViewLayouter**).
      + add a grid view layouter that is similar to CSS Grid (see
        **GridLayouter**).
      + add Scripting for UIDescription (see
        **uidescription-scripting/uiscripting.md**)
      + add new text editor view (see **lib/ctexteditor.h**)
      + a scroll view can now have a top and a left edge view (see
        **CScrollView::setEdgeView**)
      + preliminary [Wayland](https://wayland.freedesktop.org/)
        support on Linux.
  * Documentation

      + Adapt document to new licensing model.
      + Update Steinberg VST usage guidelines document.
  * cmake

      + Fix SMTG_AddSMTGLibrary.cmake (macOS/Linux): Remove old
        symlink before creating a new one.
      + Fix SMTG_PlatformToolset.cmake for Visual Studio Compiler:
        __cplusplus was not assigned to correct version (pull#13).
  * Examples:

      + Add support of new ControllerNumbers enums in legacymidiccout
        Plug-in.
      + Add support of the new interfaces IMidiLearn2 and 
        IMidiMapping2 in Note Expression Synth Plug-in.
      + EditorHost Wayland support.
  * Helper Classes:

      + Fix: Validator ScanParametersTest::run() - Doesn't Print
        Parameter Type Correctly (Issue#142).
      + Fix: validator.exe and moduleinfotool.exe Debug Version
        Throws Abort When Checking for Symlink (Issue#145).
      + Fix: Undefined Behavior (UB) in Validation Test Suite causes
        test case to fail (Issue#77).
  * VST3PluginTestHost v3.10.10:

      + Fix: potential crash at start on Windows platform (Forum).

---------------------------------------------------------------------

The SDK can be downloaded here:

# steinberg.net
[Steinberg_1200x630_generic-google]

3rd-Party Developers Support & SDKs

We offer other manufacturers the chance to develop VST- and
ASIO-based software and hardware for macOS and Windows by offering
those technologies.

github.com
[vst3sdk]

GitHub - steinbergmedia/vst3sdk: VST 3 Plug-In SDK

VST 3 Plug-In SDK

Online documentation available under:
VST - VST 3 Developer Portal (steinbergmedia.github.io)

Main VST page: vstdev.org

Your Steinberg Team

16 Likes
Steinberg and Microsoft Windows
Psychlist1972 October 22, 2025, 2:49am 3

Congratulations! Great to see both MIDI 2.0 and the new MIT license
together!

Pete
Microsoft

1 Like
olilarkin October 22, 2025, 9:19am 4

Great news!

FYI the SSL cert for https://vstdev.org/ doesn't seem to be correct.

rhansen October 22, 2025, 11:45am 5

I assume it is correct. The domain vstdev.org just forwards to VSTDev
(on github.io) where the website resides. Is your browser complaining
about that?

pongasoft October 22, 2025, 1:19pm 6

Thank you for the release and thank you for changing the Licensing.
That is a monumental change!

1 Like
olilarkin October 22, 2025, 4:31pm 7

it's working now. not sure what was wrong earlier. thanks!

1 Like
rewgs October 23, 2025, 6:12am 8

Wow, this is huge!! Not just the MIT license, not just MIDI 2.0, but
Wayland support as well?! This Linux nerd is very happy. Thank you
all!!

2 Likes
Orestis October 23, 2025, 7:18pm 9

Great news!! :slight_smile:

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