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TAE® - True Analog Emulation - is a new technology dedicated to the digital reproduction of analog circuits used in vintage synthesizers.

When implemented in software code, TAE’s algorithms guarantee authentic emulation of hardware specifications. This is why your ARP2600 V offers an unparalleled quality of sound.

In detail, TAE® combines four major advances in the domain of synthesis:

Aliasing-free oscillators

Standard digital synthesizers produce aliasing in high frequencies, and also when using Pulse Width Modulation or FM.

TAE® allows the production of totally aliasing-free oscillators in all contexts (PWM, FM...), and at no extra CPU cost.

A better reproduction of analog oscillator waveforms

The waveforms produced by the oscillators in analog synthesizers are marked by the presence of a capacitor in the circuits. The discharge of the capacitor results in a light bend in the original wave- form (notably for saw tooth, triangular and square waveforms). TAE allows the reproduction of this capacitor discharge. Underneath is the analysis of a waveform from the original ARP2600, and that of the ARP2600 V. They are both equally deformed by the ARP2600 V low-pass and high—pass filtering.

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.

A better reproduction of analog filters

TAE allows more precise emulation of analog filters than standard digital filters. To obtain this re- sult, the TAE technology is based on the analysis of the analog circuits to be reproduced, and con- verts them into algorithms that faithfully mimic the characteristics of the original filters. The curve underneath shows the comparison of the original ARP2600 filter and that of the ARP2600 V.

Ring modulator

The ARP2600 V includes a ring modulator, just like the original ARP2600. The ring modulator allows the application of a waveform (a sinusoid) to another, in order to transform it. The result is a more brilliant sound, distorted, and enriched in harmonics. As a result of this increase in the number of harmonics, standard ring modulation algorithms create an audible aliasing. To avoid this unwanted effect, TAE includes a module for the dynamic control of the amplitude with aliasing correction, which removes every trace of aliasing in the signal coming from the ring modulator.

2011-09-28, 08:00:25
Category: Virtual Instruments | Added by: BLJAK_
Views: 828 | Downloads: 34 | Comments: 2
Total comments: 2
2012-12-13 Spam
2. ryan burt (ryz1)

2012-09-28 Spam
1. Takis Tsimaratos (takitsim)
Thank you very much BLJAK.

:o ^_^ ^_^ ^_^ :o

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