preFIX is a powerful pre-mixing and audio alignment tool designed to optimize audio tracks before the main mixing stage. It offers a comprehensive set of features for cleaning up recordings, correcting frequency imbalances, and aligning phase relationships. The plugin excels in enhancing stereo imaging and managing routing with ease, helping producers achieve a balanced and polished sound early in the production process.

At its core, preFIX includes advanced frequency filtering options, such as Baxandall shelving filters and smooth Butterworth high- and low-pass filters, which emulate analog curves with pristine audio quality. Its gate and expander section features a flexible sidechain with parametric EQ and adjustable thresholds, enabling precise dynamic control. The plugin also provides extensive phase correction tools, including analog-style step-less adjustments and digital delay options, to ensure tight phase coherence across channels.

Beyond its audio processing capabilities, preFIX offers detailed output routing with multiple modes and stereo image rotation supported by a visual goniometer. Its efficient digital signal processing is optimized for high performance, with critical sections coded in assembler and SSE support. Compatible with Win32 and VST platforms, preFIX serves as an essential utility for producers seeking clean, aligned, and well-balanced audio tracks at the start of their mixing workflow.