Levelproof Compressor kills loudness bias during A/B testing, and Stemwire charges $29 for this macOS and Windows plugin.
Four distinct models handle gain reduction differently while maintaining identical output levels automatically. CLASSIC, BUS, BUTTER, and PUNCH let users compare actual compression behavior instead of volume tricks. Bypass matches that same level for honest evaluation.
BS.1770 gating drives the K-weighted loudness matching algorithm rather than guesswork. Makeup gain adjusts precisely after every parameter tweak using measured differences. Offline renders stay perfectly aligned with playback because processing happens on the render thread.
Attack and release times use real milliseconds converted at the active sample rate. Sidechain filtering includes high-pass and low-pass options across all models. Threshold, ratio, mix, and output controls provide standard shaping capabilities alongside preset saving.
Demo versions contain zero time limits or network checks despite occasional noise bursts. Universal macOS builds support VST3 and Audio Unit formats with proper notarization. Windows users get x64 VST3 compatibility without subscription requirements.
Four distinct models handle gain reduction differently while maintaining identical output levels automatically. CLASSIC, BUS, BUTTER, and PUNCH let users compare actual compression behavior instead of volume tricks. Bypass matches that same level for honest evaluation.
BS.1770 gating drives the K-weighted loudness matching algorithm rather than guesswork. Makeup gain adjusts precisely after every parameter tweak using measured differences. Offline renders stay perfectly aligned with playback because processing happens on the render thread.
Attack and release times use real milliseconds converted at the active sample rate. Sidechain filtering includes high-pass and low-pass options across all models. Threshold, ratio, mix, and output controls provide standard shaping capabilities alongside preset saving.
Demo versions contain zero time limits or network checks despite occasional noise bursts. Universal macOS builds support VST3 and Audio Unit formats with proper notarization. Windows users get x64 VST3 compatibility without subscription requirements.
