I’m currently testing my plug-ins in Cubase versions 8 and 9 under macOS and Windows to ensure everything as expected.
I also run the VST3 test host unit tests from time to time, as well the VSTScanner that was posted here, and Wavelab LE.
I assume Nuendo uses the same engine as Cubase under the hood, so testing with Cubase should be sufficient (except with surround plug-ins).
I’d like to know what Steinberg recommendations / best practices are in that regard, and possibly what kind of tests you run for your own plug-ins.
I have bought a license for Cubase + regular updates, and it really is not possible to purchase a Nuendo license for testing purposes.
On this topic, Avid have published a detailed test sheet for testing AAX plug-ins inside ProTools etc., and I think that’s quite a neat idea.
Would you consider publishing some kind of recommended/required conformance, feature and stability test sheet for VST/VST3 ?