: It is frequently cited as a "CPU hog" compared to other filters. Users on ReasonTalk note that while it sounds excellent, it consumes significantly more DSP power than standard filter REs due to its complex component-level modeling.
The Rack Extension (RE) for Reason, developed by Primal Audio , is a high-fidelity analog-modeled filter based on the legendary transistor ladder design of the Minimoog . It is widely regarded for its "warm" and "organic" character but is also known for being resource-intensive. Core Features Reason RE Ladder Multimode Filter [WiN]
: It can be used for subtle harmonic thickening or driven into heavy analog distortion and "mayhem". Performance & Sound Analysis : It is frequently cited as a "CPU
: Includes a unique stereo-spacing effect, allowing users to spread the filter across the stereo field, which is not possible on the original mono hardware. It is widely regarded for its "warm" and
: It is ideal for adding character to clean digital oscillators or for creative sound design where a "creamy" filter sweep is desired. Technical Specifications Developer Primal Audio Model Base Minimoog Transistor Ladder Modes Low-pass, Band-pass, High-pass Additional Effects Stereo Spacing, Input Drive Platform Reason Rack Extension (WiN/macOS) Ladder Multimode Filter | Analogue Filter - Reason Studios
: Users describe the sound as "utterly fantastic" and very faithful to the iconic "Moog sound". The resonance adds a distinctive overdriven warmth that is a hallmark of the 24dB/octave ladder architecture.
: Unlike the original hardware, which was primarily low-pass, this RE features a mixer that allows for simultaneous low-pass (LP), band-pass (BP), and high-pass (HP) filtering.