www.kvraudio.com/news/apu-software-updates-loudness-series-to-v4-3-1-64596
19th August 2025
APU Software has updated TrueGain, Loudness Contour, Loudness Meter, Loudness Compressor, Dynamics Optimizer, and Loudness Limiter to version 4.3.1.
Recent changes include:
Expand max TrueGain range to +/- 48 dB (truegain).
Improve dial behavior with asymmetric TrueGain range (truegain).
Persist ABC slots across editor instances.
Support Reference SPL => Target SPL for translation checks (truegain).
Disable window duration button after optimization (optimizer).
More readable font.
Add combo-box for IIR contour type (optimizer).
Fix stutter on reset meter (meter).
Fix output histogram. (optimizer).
Clarify open file is single-file only (meter).
Fix statistics to use fixed-width font (meter).
Fix button layout for alternate raster orientation (meter/optimizer).
Max range parameter for TrueGain knob (truegain).
Disable gain knob skew for better MIDI control compatibility (truegain).
Tweak auto-range zoom-in rate.
Fletcher-Munson smoothing (contour/truegain).
Add 'C' save state slot.
The update is free for registered owners.
KVR Audio, Inc.
www.kvraudio.com