ARTURIA – PROPHET V - MANUAL
11
Temporal representation of a Prophet V “saw tooth” waveform reproduced by TAE
What’s more, the original analog oscillators were unstable. In fact, their waveform varied
slightly from one period to another. If we add to this the fact that the starting point for each
period (in Trigger mode) can vary with the temperature and other environmental conditions, we
find one of the characteristics that contributed to the typical sound of vintage synthesizers.
TAE
®
reproduces the instability of oscillators, bringing a fatter and “bigger” sound.
1.2.3
Direct Filter Circuit Modeling
Due to advances in computer processing power, the Prophet V can now employ direct filter
modeling techniques to achieve unprecedented accuracy in the emulation of the
original's analog 4 pole low pass filter. By modeling the operation of the individual hardware
components of the filter circuit, the warm nuances synonymous with the original's analog sounds
are recreated. This graph is a frequency domain plot as just a single example of direct circuit
modeling in action; it shows the generation of harmonics at multiples of the resonant frequency
when the filter is in self oscillation mode, for both the virtual (blue) and original (red). These
harmonics are characteristic of the Prophet 5's filter and are due to the non-linear behavior
inherent in its analog circuitry. The harmonics generated add to the richness and warmth of the
sound produced by the filter. As a result of the direct recreation of the analog circuitry in the
Prophet V, the same characteristics of the sound are present, thus giving the user a truly analog
sound.
