Since development on Hypersonic 2 stopped years ago (succeeded by Steinberg’s HALion ), the source code was never updated to the x64 architecture.
Are you having trouble getting a when trying to bridge the plugin, or
If you are trying to run it in a modern DAW (like Ableton Live 11+, Cubase 12+, or FL Studio 64-bit), here is everything you need to know about finding a solution and why a simple "64-bit DLL" download usually doesn't exist. Why You Can’t Find a Native "Hypersonic 2 64-Bit DLL" Hypersonic 2 64 Bit Dll
There is no official file. To use this classic synth today, your best bet is to use JBridge to wrap the original 32-bit file. This allows you to keep those iconic patches in your modern productions without compromising system stability.
A 64-bit DAW cannot "see" or load a 32-bit DLL file directly because the memory addressing is fundamentally different. Since development on Hypersonic 2 stopped years ago
However, there is a major catch: It is a legacy 32-bit VSTi.
The official successor to Hypersonic.
A massive library covering almost every instrument imaginable.