VariVerb Pro is an internal VST effects device. This reverb unit creates classic and modern artificial reverb effects such as room, plate, spring, and nonlinear reverb based on algorithmic calculation, i.e. without using impulse responses.
With VariVerb pro (VARIable reVERB) Samplitude offers you a virtual effects device with high-quality reverb algorithms to add depth to your recordings. Unlike the Samplitude room simulator the created reverb is not based on impulse responses but is calculated in "traditional" manner based on a complex reflection pattern and different software models.
The benefit of an algorithmic reverb is that you can influence different parameters and design the room impression as you like. Some few effects (e.g. modulation) can not be created with a convoluted reverb, so the algorithmic process still has to exist. The sound coloring possibilities of this conventional reverb creation method also has interesting potential with regard to a sound esthetic perspective.