And in your experience, how long will it take to process this license application? This is a UI toolkit primarily for audio plug-ins (VST, AudioUnit, etc.). Based on the XML definition of the plug-in UI, VSTGUI contains a built-in editor (UIDescription Editor) that allows the developer to create a plug-in UI by simply creating the UI element by dragging and dropping. First developed by Steinberg Media Technologies (circa 1998) for the first VST modules. Later added as binary libraries to the official VST SDK. Since May 2003, VSTGUI is open source and is now hosted on GitHub, github.com/steinbergmedia/vstgui.The latest official version of VSTGUI is still included in the VST 3 SDK. To reflect here your confirmation that it is normal to register late (after the release of the product) in the signed agreement, could you retroactively indicate a date of execution (in accordance with our request in the e-mail)? steinbergmedia/vst3sdk: VST 3 Plug-In SDK, Typically, a VST plug-in can record a stream of audio data, apply a process to the audio, and return the result to the host application. A VST plug-in containing the VST SDK package. API VST 3; implementation support classes VST 3; AAX, UA, AUv3 and VST 2-Wrapper; Examples of SVST 3 plug-ins; The full VST 3 SDK is available here!. It contains: a VST 3 Plug-in Test Host Application/Validator, the Steinberg VST 3 plug-in SDK license agreement that you must sign if you want to develop or host VST 3 plug-ins. I think this is the best way to remove the call instruction, provide the license, and install the asio.h. . . .