I think distortion/saturation and other such nonlinear processes are another. I agree, filters are one area where analog may have a certain sound of its own that's tough to reproduce in digital emulations.

Please note that the download includes only the DSP Emulator as we cannot and will not provide any ROMs due to copyright reasons.

The version on our website which doesn’t have all the parameters exposed can be found here The full GUI is currently being implemented :) The Emulator currently has no GUI but has a temporary one with all parameters exposed (this version can be downloaded from our discord server) In its current state the emulator is able to run the Access Virus B/C ROMs and is identical to the hardware, we will be moving onto the Virus Ti next and the Waldorf synths Our emulator isn’t what you would typically see in the audio world in which people recreate the sounds close to those synthesizers, what we have created allows the digital hardware synthesizer in its entirety to be run as a program on the computer and be controlled exactly like the real hardware is present and with an identical sound

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. We are a group of people who are currently Reverse Engineering and Emulating the Motorola DSP563xx

Access virus ti vst cracked