Yamaha has released S90 XS/S70 XS Editor and S90 XS/S70 XS Editor VST for Windows (incl. x64) and Mac OS X.
The S90 XS/S70 XS Editor VST, based on the "VST3 technology" by Steinberg, works as a VST3 plug-in in Cubase series 4.5 or later. The S90 XS/S70 XS Editor VST works the same way as other VST instrument software, allowing you to save the edited settings of the new S90 XS/S70 XS hardware synth, or use them for another project.
In addition, you can handle the S90 XS/S70 XS Voices in the Media Bay window in Cubase when using the S90 XS/S70 XS Editor VST with Cubase 4.5 or later, allowing you to search for, listen, and play the S90 XS/S70 XS Voices within Media Bay in Cubase.
The S90 XS/S70 XS Editor VST provides a comprehensive and seamless music production environment - making the use of hardware and software both easier and much more efficient.