APU Software APU Loudness TrueGain v4.2.7
U2B macOS | AU | VST3 | STANDALONE | AAX | 76 MB

TrueGain Real-time equal-loudness compensated gain control.
APU TrueGain is a gain control that preserves perceived tonal balance as you move level up or down-ideal for automation, print levels, and quick translation checks. “Compensated Gain Control” presets apply ISO 226 (2023/2003) or Fletcher-Munson FIR contours so turning the gain doesn’t thin out the lows or hype the highs. “Translation Check” presets simulate different listening levels without touching your monitor volume. Choose linear or minimum phase, set smoothing to avoid artifacts, and use the built-in analyzer for visual confidence. Optional SPL calibration aligns the model to your room or headphones for even more accuracy.

home page: https://apu.software/truegain/

APU_Software_APU_Loudness_TrueGain_v4.2.7_U2B_macOS-MORiA