Ian,

The Wersi synth engines are Sonic Core plugs and utilize the SG12 card to run. If you go to Sonic Cores web site and check out the Minimax, Profit 5. Vectron, Modular 3, Prodyssey, and others, you'll hear what the Wersi synth sounds are like. John Bowen designed many of the plugs for Sonic Core and spent years refining them to be as close to the original as an emulation can be.

The next generation Wersi instruments supposedly no longer use the SG12 card so I'm not sure how they are running the various synth engines. I'm sure they must have a custom DSP to run the programs, I just don't know which one. Producing sounds of this nature takes a lot of horsepower which is why the SG12 card is in the Wersi. The SG12 is a multi DSP FPGA.