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OpenPreamp 1.1.2
The 1.1.2 release upgrades static preamp anti-aliasing to HybridEQ's Residual ADAA architecture, eliminating high-frequency attenuation while preserving robust anti-aliasing protection.
- HybridEQ Residual ADAA Architecture: Replaced uncompensated two-sample averaging with a split linear/residual topology (
dsp::adaa::Residual). Linear small-signal audio passes through a unity-gain phase-matched all-pass filter, maintaining transparent top-end energy from 20 Hz to Nyquist (< 0.005 dB difference at 20 kHz). - Non-Linear Residual Anti-Aliasing: Anti-derivative anti-aliasing is applied exclusively to the non-linear distortion residual with smooth compression cross-fading under deep saturation.
- Closed-Form & Hermite Antiderivatives: Implemented exact mathematical antiderivatives (
legF,railLimitF,coreSaturateF,asymLimitF) across Brit, N-Type, FSF, and A-Type models. - Alias Suppression: Retains 4.5 dB to 7.7 dB alias foldback reduction at 1x oversampling without compromising audio brightness or clarity.
- Universal macOS Package: Includes Developer ID signed and Apple-notarized VST3, AU, CLAP, and LV2 plugins in a system-wide PKG and DMG for macOS 11+.
See user manual and version history.