Parallel Parametric Equalizer Algorithm
In earliest parametric equalizer units, all filter bands are connected in parallel rather than in series-cascade as in conventional parametric equalizers. The parallel architecture has a distinctive musicality due to different phase behavior and smoother interaction between adjacent bands. In order to achieve symmetrical curves for boost and attenuation, filter bands are placed in feedback paths during attenuation. While trivial to implement in the analog domain, implementation of these feedback paths in the digital domain is rather involved due to the resulting delay-free feedback loops which are considered as uncomputable in classical digital signal processing theory. The PEQ4 Algorithm accurately and efficiently simulates the latest version of first generation units in the digital domain with its meticulously designed topology which inherently has the ability to authentically emulate delay-free feedback loops.
PEQ4 Parallel Parametric Equalizer Algorithm features five overlapping bands which have the following specifications:
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