You're looking for information on the Steinberg Hypersonic 1 VST plugin. Here's some text that might help:
Steinberg Hypersonic 1 is a legacy virtual workstation released in 2003 as an all-in-one "music workstation" plugin. It is currently classified as unsupported software, meaning it is no longer sold or officially maintained by Steinberg. Availability & Download steinberg hypersonic 1 vst plugin download
Since the software is discontinued, you cannot purchase it directly from the official Steinberg website . However, there are still ways to access it: Official Legacy Support You're looking for information on the Steinberg Hypersonic