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600 EFFECTS MENU
The spring reverb is implemented in VariVerb Pro as a digital effect based on so-called
"physical modeling" algorithms. Based on a mass-spring system, the effect operates similar
to the physical model of a swinging string.
Parameters:
• EQ low/high: See room/reverb
• Pre-delay: See room/reverb
• Size: Size of the spring system, i.e. length of the springs. A smaller value results in a very
short response time and short echoes, greater values slightly spread the typical
"oscillation" of the spring. The length of echoes is increased.
• Decay: Decay length. Please note that unlike the room/reverb and plate models, an
echo effect remains if the decay times are longer. This corresponds with the natural
characteristic of a spring as they continue to be in movement during the release phase.
• Saturation: The spring models also include the processes when "outputting" the signal
and "receiving" it via the magnet/coil system. The transfer of electric energy into
mechanical power and vice versa is non-linear so that (harmonic) distortions may occur if
the input level is quite high. The saturation parameter more or less increases the output
volume and switches the system into "saturation". Depending on the material, a very
interesting organic effect occurs which highlights the vintage character.
HQ (High Quality) models (Room A/B & Reverb A/B)
The above-described room and reverb algorithms are of high quality, very versatile and
require particularly low CPU power. If you would like even more realistic and higher quality
rooms and your CPU load is of secondary interest, you should take a look at the HQ
models. They simulate a room with rare plasticity and naturalness, almost as if impulse
responses were the basis. But they are not. VariVerb Pro has a huge armada of delays and
filter stages. They require more CPU time; however, it is a good investment.
In comparison to other models these algorithms cast a far closer meshed net over the
virtual room. The results are natural, fast diffusion and decorrelation of the signal, a high
complexity of the reverb signal without echo pattern, and the possibility to freely position
the stereo source and the two virtual microphones.
If the HQ rooms are opened in "Expert" mode you will first notice that editing of the early
reflections is missing. The reason: with the non-HQ models, the artistic and sound
manipulating effect is to the fore. A natural room, however, does not differentiate between
early and late reflections. They migrate in time. The proportion of early reflections depends
on the position of the audience.
In HQ mode such a reflection pattern and entire sound impression including stereo
positioning can be edited in a top view of the selected room. In "Expert view" the usual
section with the reverb sustain moves to the right and makes room for viewing from above.