The Usual Suspects DSP56300 Emulator 1.2.25 MultiOS + ROM's free
This DSP has been used in plenty of virtual analogue synthesizers and other musical gear that was released after around the mid 90s, such as Access Virus A, B, C, TI / Clavia Nord Lead 3 / Waldorf Q, Microwave II / Novation Supernova, Nova and many others.
You can think of this as being similar to the multitude of video game emulators that are out there, which don’t actually do anything until you provide a hardware ROM. And this is where it gets a little murky; while the emulator itself is not illegal, the sharing of ROMs most definitely is.
The DSP56300 developers say that they’re planning to release a VST/AU plugin version of the emulator at some point in the future.
When this might arrive is hard to say - the project is being worked on in people’s spare time - but a primitive version of the emulator, with no GUI, can already be downloaded. This can be controlled using either VirusHC or Ctrlr, and you’ll need a virtual MIDI cable.
For More infos & donwload you can visit the official DSP6300 website from here