Direct Filter Circuit Modeling - Arturia CS-80 V User Manual

1.3.3. Direct Filter Circuit Modeling

Due to advances in computer processing power, TAE® can now employ direct filter modeling
techniques to achieve unprecedented accuracy in the emulation of a hardware synthesizer's
filter. By modeling the operation of the individual hardware components of the filter circuit,
the warm nuances synonymous with analog sounds are recreated.
The following graph shows a single example of direct circuit modeling in action. The peaks
represent the generation of harmonics at multiples of the resonant frequency when a
particular filter is in self-oscillation mode. These harmonics are characteristic of hardware
synthesizer filters; they come from the non-linear behavior inherent to their analog circuitry.
Anomalies such as these add to the richness and warmth of the sound produced by the
filter.
Notice there are two lines on the graph. Those are the superimposed frequency domain
plots for one of Arturia's virtual instrument filters, and of the hardware filter it's emulating.
They are practically indistinguishable, both on the graph and to the human ear. The direct
recreation of this analog circuitry causes the same characteristics of the sound to be
present, thus giving the user a truly analog sound.
So here's the bottom line: when you bring together a bunch of music lovers who also have
a deep understanding of the characteristics of electronic circuits, you wind up with Arturia.
And when Arturia decides to honor the colorful history and stunning sound of one of the
most famous synthesizers ever, you wind up with CS-80 V4.
We take great satisfaction in knowing this great synthesizer will help you explore previously
unknown musical territory, and we can't wait to hear what you do with it!
8 Arturia - User Manual CS-80 V - Introduction