Touch & Turn Supportt

WillWilliams · 7 August 2025 12:54

I am new to Fourier Audio Transform Engine; and as a plugin developer I would like to make sure I leverage all the goodness I can.

What Steinberg::Vst (extended) interface (and class id) should I implement to give my plugins ‘Touch and Turn’ support?

I have dumped all the class ids hitting the queryInterface for my editor (I am using JUCE) and need just a bit of guidance.

Thanks in advance,

Will Williams

Elliot · 8 August 2025 13:53

Hey Will,

To implement touch and turn, the only required interface is IParameterFinder. An overview can be found here:

https://steinbergmedia.github.io/vst3_dev_portal/pages/Technical+Documentation/Change+History/3.0.2/IParameterFinder.html

The interface API is as documented in the VST SDK, here:

https://steinbergmedia.github.io/vst3_doc/vstinterfaces/classSteinberg_1_1Vst_1_1IParameterFinder.html

The class ID is per the interface base class in the VST3 SDK, here:

github.com

steinbergmedia/vst3_pluginterfaces/blob/dd77488d3dc329c484b5dfb47af9383356e4c0cc/vst/ivstplugview.h#L55


      
          {
          public:
          	//------------------------------------------------------------------------
          	/** Find out which parameter in plug-in view is at given position (relative to plug-in view).
          	 * \note [UI-thread & (Initialized | Connected) & plugView] */
          	virtual tresult PLUGIN_API findParameter (int32 xPos, int32 yPos, ParamID& resultTag /*out*/) = 0;
          	//------------------------------------------------------------------------
          	static const FUID iid;
          };
          
          DECLARE_CLASS_IID (IParameterFinder, 0x0F618302, 0x215D4587, 0xA512073C, 0x77B9D383)
          
          //------------------------------------------------------------------------
          } // namespace Vst
          } // namespace Steinberg
          
          //------------------------------------------------------------------------
          #include "pluginterfaces/base/falignpop.h"
          //------------------------------------------------------------------------

Hope this helps!

Thanks,

Elliot