Without revealing trade secrets, could someone explain the basic principle/process that Fractal uses to create their amp models? Do they model the actual circuit diagrams of the real amps? Or is it more of an empirical process whereby they feed an impulse into a real amp and measure parameters in the output signal (for example in their tone match block)? If they measure parameters, what are the parameters that they measure?
Owner's Manual:
"Quantum™ Amp Modeling™ with Virtual Vacuum Tube™ Technology and MIMIC™
All this power would be useless without superior algorithms to take advantage of it. Years of research have yielded
Quantum Amp Modeling Technology, comprising major breakthroughs in both preamp and power amp modeling. Quantum is the pinnacle of our multi-generational amp modeling and a complete departure from the static waveshaping technology used by other products. It entails digital replicas of vacuum tubes, complete with time, frequency, and level dependencies. This creates a level of dynamic realism in a class of its own. Like our "G3" modeling before it,
Quantum™ also models the entire power amp, including the phase inverter, power tubes, output transformer, power transformer, choke, filter caps, and more. The results are amazing: tight bass, powerful midrange, silky highs, plus highly expressive touch sensitivity.
Our amp models are the result of thousands of hours of incredibly detailed analysis of the actual amps that inspired them. We spent a small fortune searching out and purchasing vintage and modern amplifiers to add to our reference collection.
Quantum™ is a significant advancement in amplifier simulation unmatched by any other product at any price point."