Release Notes

Version history for APU Software products, organized by series.

What changed

Latest releases

The current release for each product series, in one place.

Clarify K-System and Broadcast reference SPL descriptions

307 earlier releases

Notify Pro required if entering track count >5

18 earlier releases

Earlier versions

Release archive

Choose a major version to scan every release in that era.

Loudness Series

307 earlier releases

Current release

Version 5.x 55 releases v5.7.6-v5.0.0

Fix annoying AUv3 regression

Improve visual contrast

Fix high-DPI axis alignment and frequency-scale consistency across spectrum and EQ displays

Logo refresh

Light mode improvements
Rendering performance improvement on high refresh monitors
Additional rendering performance improvements (spectrum/contour/truegain)

Raster shader improvements
Fix popup menu text being trimmed
Fix some presets not using correct raster type

Average/Integrated gain compensation feature (compressor)
Fix speaker calibration signal levels (contour/truegain)
Purpose presets for precise target matching (compressor/optimizer/limiter/leveler/meter)
Improve range sliders for narrow bands

Upgrade to JUCE 8.0.14
Option for reset on play (meter/spectrum)

Linux bundle fix

Preset browser mouse hover tracking
Update from vs2019 to vs2022 (Windows)
Experimental Linux support (Linux)

Average/Integrated gain compensation feature (optimizer)

Logo refresh

Fix macOS code signing

New chip-based user interface layout (limiter)
Average/Integrated gain compensation feature (limiter)
Reduce CPU in certain cases when enabling/disabling limiter types (limiter)
Support keyboard preset navigation from main UI
Update to JUCE 8.0.13
Restore preset theme colors

New Tight timing mode and presets (leveler/compressor/optimizer/limiter)
Show limiter activity in peak GR meter (leveler/compressor/optimizer)
Fix threshold mouse behavior (limiter)

Fix PLR/PSR/Crest peak durations (meter)
Fix startup/reset glitch in contour shape (contour/truegain)
Audio thread optimization (contour/truegain)
Preset browser with search and categories
Add option to full reset on preset load
Fix text overlapping in horizontal orientation

Fix AU validation failures

Separate low-latency setting from timing mode (leveler)

Add Integrated reset for PLR (meter)

Support PLR/PSR/Crest peak ratio output types (meter)
Add warning when Detector EQ monitor is enabled (compressor/leveler)
Allow macOS installers to install older versions

Fix slow startup!
Fix preset names not updating in certain scenarios

Fix name mismatch for calibration signals (contour/truegain)
Improve FIR contour filter switching performance (contour/truegain)
Mini-mode toggle in upper-right next to dark mode toggle (truegain)
Fix rare race condition during latency updates

Add Hold low-level type (leveler/compressor/optimizer)

Show secondary target whenever enabled (leveler)

Average/Integrated gain compensation feature (leveler)
Secondary target loudness/tolerance for low-level and sidechain (leveler)
Replace calibration vocals (contour/truegain)
Threshold rendering and interaction improvements
Integrated measurements optimization

Fix for low-latency sidechain modes (leveler)
Fix missing axis on UI scale

Expand target loudness range to -60 (leveler)
Fix trueGain/targetSPL params not loading from presets reliably (truegain)

CPU usage reduction

Add gain change automation writing via settings tab
VST3 snapshots
Memory usage reduction, for real this time

Memory usage reduction, particularly for leveler

Logo refresh
Default LUFS-compliant, add contour toggle (leveler)

Fix auval validation (leveler)

Initial leveler release (leveler)
Put vibe-check pre-limiter (compressor/optimizer)
Faster default limiter settings (compressor/optimizer/limiter)
Fix latency params not always loading correctly

Adaptive startup/edges fix (meter/compressor/optimizer/limiter)
Fix attack-lookahead timing (compressor/optimizer/limiter)
Fix ABC slot persistence!
Reduce hiccups on history resets

Fix tooltip not displaying for peak meter
Additional minor performance improvements

Fix units on visualization range (spectrum/contour/truegain)
Core performance improvements
Timing engine accuracy improvements
Fix mouse hit detection with UI scaling enabled
Improve popup look and feel within certain DAWs

Minimal CLI interface for standalone applications
Display source signal during sidechain

Fix macOS small icon (macOS)
Improve multi-channel spectral rendering accuracy (spectrum/contour/truegain)
Fix LUFS surround/Atmos channel weighting and LFE exclusion

Pause auto-range during threshold dragging (meter/compressor/optimizer/limiter)

Threshold rendering improvements (meter/compressor/optimizer/limiter)
Threshold mouse controls (meter/compressor/optimizer/limiter)
Fix full reset while source/target learn enabled (compressor)
Fix gate timing and dial skews (compressor/optimizer)
Improve source/target learn for multi-channel (compressor)
Installer warning on missing Visual C++ Runtime (Windows)
Minutes history length support
Fix ctrl while range slider is dragging
Dial/slide in 0.10 increments

Show loudness history peak option (meter/compressor/optimizer/limiter)
Show spectral histogram peak option (spectrum/contour/truegain)
Mel scale axis (spectrum/contour/truegain)
Cleaner statistics background (meter)
Prune duplicate default presets (compressor/optimizer/limiter)

Separate win64/win32 installers to reduce download sizes (Windows)
External file loudness histogram matching and source distribution type (optimizer)

Logo refresh
Undo/redo support in standalone applications
Multi-line text bubbles for layered panels
Persist ABC save slots

Enable "breath" effect for vibe check mode (compressor/optimizer)
Make Traditional presets window duration consistent (compressor/optimizer)
Support loopback audio input in standalone applications
Fix audio settings combo-box popup issue

Additional look-ahead modes (compressor/optimizer)
Update to JUCE 8.0.12

Add detector EQ in Loudness tab (compressor)
General performance improvements

Fix contour flattening at extremes (truegain)

Improved ballistics dithering to smooth out quantization artifacts
Sync distribution ranges more usefully (optimizer)
Support installing only selected plug-ins for Windows installers
Cleanup installer product/format selection for macOS installers

Added support for double-precision processing in supported hosts

Optimization, continued look and feel improvements

More layout fixes

Tidy up layouts, fix limiter layout

Break Bypass/Delta toggles into Normal/Bypass/Delta
Reset trial period for all users

Gain reduction metering (contour/truegain)
Don't change limiter mode on target range load (compressor/optimizer)

Revamped look and feel
Introducing Vibe check mode (compressor/optimizer)

Version 4.x 49 releases v4.7.3-v4.0.0

Support for negative look-ahead (compressor)
Improve look-ahead double click default (compressor)
Fix playback controls vs spacebar inconsistency (optimizer)

Fix double clicking track behavior
Fix release look-ahead (limiter)
Fix unreliable LRA during file load (meter)

Further filter improvements (contour/truegain)

Fix timestamp jitters/artifacts in certain long-running scenarios
Fix look-ahead mode average (compressor/optimizer)
Remove high-pass option, always enabled (contour/truegain)
Filter quality improvements (contour/truegain)

Bring back ECMA-418 presets (compressor/optimizer/limiter)

Fix sidechain causing peak limiter overs (compressor/optimizer/limiter)

Improve threshold display (limiter)
Tweak default target range (meter)

Fix crash when changing certain global parameters
Meter texture improvement
Full Histogram presets use auto range (meter)

Add Gain Control mode (truegain)
Add support for sidechain as target signal (spectrum)

Support bar mode raster types
Improve histogram bucket hit testing accuracy
Axis scaling option in Settings tab
Fix potential crash on global settings load/save

Cross-hair style bucket inspection for loudness history and spectral histogram
Auto-select text box for save preset dialog

Fix Studio One not loading VST3 plug-ins (2nd try!)

Fix Studio One not loading VST3 plug-ins

Logo refresh

Fix meter glitching under low-latency in certain DAWS (meter)

Headphones calibration signal and process (contour/truegain)
Update to JUCE 8.0.10

Fix crash in loudness tab (meter)

Note: This version includes fixes/improvements which could change the sound of existing saved presets (contour/truegain)
Adaptive SPL via loudness analysis (contour/truegain)
Filtering interpolation optimization (contour/truegain)
More consistent attack/release ballistics behavior (contour/truegain)
Support SPL calibration and target SPL combo-box (contour)
Attack/release configuration (contour)
Fix CPU spikes in certain scenarios
Preset manager fixes
Tidy up user interface elements

Add snapshot copy between panels
Fix snapshot import dialog for macOS

Fix snapshots for multi-channel audio (spectrum/contour/truegain)
Snapshot import/export

Improve Kaiser Beta layout (spectrum/contour/truegain)
Fix slow FFT init for large window sizes (spectrum/contour/truegain)

Initial release (spectrum)

Support spectral and loudness histogram snapshots
Fix link overwriting group title (meter)

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

Initial release (truegain)
Improved frequency response precision, particularly for minimum phase (contour)
High-pass filter support for all filters (contour)
Smoother switching of contour types (contour)
Improved contour zoom (contour)

Ballistics cross-fading improvements (contour)
Tweak contour range detection (contour)

Filter loading optimization (contour)
Fix crash on loading NONE filter! (contour)
Skew input/output gain rotary dials to avoid accidental massive gain changes

Fix potential crash with certain block sizes (contour)
Reduce latency for minimum phase and some linear phase contours (contour)
Tidy up visualizer auto-zoom on contours (contour)
Filter tap resampling for unusual sample rates (contour)
Retire macOS i386 and arm64e builds

Support ECMA-418 contour, update presets (compressor/optimizer/limiter)

Fix 'Full Range' range presets
More reliable spectrum decay on silence (contour)

Intra-block smoothing for contour changes (contour)
Component rendering optimization

Default to minimum-phase filter (contour)

Disable Direct2D to reduce flickering on Windows

Upgrade to JUCE 8x

Fix occasional crash when switching tabs
Add separate sliders texture w/configuration
Layout engine optimization

Reduce binary file sizes (contour)

Improve contour interpolation and consistency (contour)
Fix alignment of axis labels (contour)
Per-panel auto range support, other auto range improvements
Fix delta history/histogram bounds issue
Various bug fixes and improvements

Fix low-level bypass incorrectly holding gain reduction (compressor/optimizer)

Upgrade AAX SDK to support more Atmos channel configurations
Slightly highlight 0 dB axis line (contour)

Support ITU-468, A-weighting, C-weighting IIR contours (compressor/optimizer/limiter)
Fix 'Deep' presets load issue (compressor/optimizer/limiter)

Version 3.x 59 releases v3.7.8-v3.0.0

Significant memory usage reduction (contour)
Fix spectrum dB scale accuracy (contour)
Switch to more intuitive axis tick increments for dB
Fix manual visualizer range restoration

Improve auto range behavior
Fix history size glitches on resize (contour)

Switch default theme to APU Default

Fix occasional spectrum analyzer glitches (contour)
Fix stutter on bypass toggle (contour)
Improve auto range label visibility

Initial release (contour)
Tweak limiter icons for clarity (limiter)

Minor fixes

Fix axis tick count in certain situations

Better uniform random number generation for dithered ballistics
Double the number of color themes
Smooth axis zooming

Fix LUFS limiter ceiling offset in certain cases (limiter)
Fix latency-dependent preset parameters not loading in certain situations

Improved axis and text bubble overlay

UI Scaling option in Settings tab

Use fixed width font for axis and some other elements

Support axis lines w/out axis itself enabled
Switch default theme to APU Cyan

Don't change dynamics/range type when load preset ranges disabled (compressor/optimizer)
Make load preset visuals & load preset ranges user-scope
Fix limiter target range load/detect in some cases (compressor)

Fix threshold disappearing on resize

More font refinements

More legible font

Bypass and gate use non-sidechain signal while sidechain under source min (compressor)

Fix built-in limiter while sidechaining (compressor)

Always show transfer function for alternate dynamics types (compressor)
Threshold rendering improvements

Fix auto-range when thresholds disabled!

Fix missing dB meter (compressor/limiter)

Fix learn crash on silence (compressor/meter)

Match learn rate to ballistics correctly (compressor/meter)
Fix histogram bucket hit test when resized!
Further histogram bucket scaling refinement

Switch to min/max distribution range type by default (optimizer)
Improve histogram bucket scaling detection

Use attack/release ballistics for learn function (compressor)
Support mouse-over context for vertical orientation delta history (meter)

Don't automatically enable limiter on target range presets (compressor)
Fix background image usage for popups/dialogs

Fix OpenGL background image refresh issue

Use background image for some UI components
Replace super-sampling with window size matched render size

Improved raster contrast/precision
Support vertical raster orientation (meter)

Swap panel texture

Improve meter texturing
Tweak light mode colors

Fix histogram sample expiration during history resize

Multiple file batch exporting (optimizer)
Fix peaks getting through limiter (optimizer)
Click to reset peak meter

Improved low-level bypass behavior (compressor/optimizer)
More prominent peak/gr meter

Advanced gate configuration for low-level type gate (compressor/optimizer)

Performance improvement for long audio w/integrated enabled (compressor/optimizer)

Fix dynamic changes to momentary window durations
Add configurable window duration for short-term loudness
Improve auto range for peak modes

Fix limiter overs under certain multi-type configurations! (limiter)
Reduce limiter artifacts (compressor/optimizer/limiter)

Fix crash when opening new file with one already open (optimizer)
Faster undo optimization (optimizer)
Disable loop by default (optimizer)

Performance fix for Momentary windows != 400ms

Fix loudness types enable/disable not updating visually (limiter)
CPU optimization for component refreshing

Fix offline rendering performance issue

Fix saved look-ahead settings load error

Component refresh optimization

Fix look-ahead in certain scenarios
Fix look and feel for some dialogs

Fix custom default preset not loading for new plug-in instances
Fix history visualization under certain conditions
Move buttons to upper-right of group (limiter)

Fix dials not always updating

Attack and release hold parameters (compressor/optimizer/limiter)
Various look & feel improvements

Fix dry/wet (limiter)

Dry/wet parameter (limiter)
Change AUTO panel layout (limiter)
Fix threshold rendering for ceiling < threshold (limiter)
Smoother history animation with large buffer sizes
Support custom panel and meter textures via theme tab

Fix file load deadlock during analysis (meter/optimizer)
Raster shader improvement
Logo update

Analyze all bool parameter for faster file loading capability (meter/optimizer)
Improve load file performance (meter/optimizer)
Close file but don't full reset after preset invalidates analysis (optimizer)

Panel and GPU performance improvements
Shrink binary file sizes a bit more

Shrink binary file sizes, add bundle installer
Defer trial start until explicitly activated (limiter/compressor/optimizer)

Limiter threshold + ceiling configuration (limiter/compressor/optimizer)

Limiter layout improvement (limiter)
Consistent font for tabs

Performance optimizations
Fix integrated statistics for file load (meter)

Set channel-split LUFS channels as dual-mono for consistent loudness
Look-ahead performance improvement (compressor/optimizer)
Remove negative look-ahead for limiter (optimizer)
Fix rare source max percentile range detection inaccuracy (optimizer)
Fix expansion ratio text parsing (compressor)
Support lower visualizer delta field decay rates
Filename in title bar (optimizer/meter)
Initial limiter release (limiter)

Version 2.x 65 releases v2.9.2-v2.0.0

Fix panning issue for channel-linked modes w/output gain (compressor/optimizer)

Fix target histogram not always refreshing (optimizer)
Minor fixes and improvements

Integrated loudness types (compressor/optimizer)
Fix for True Peak limiter (compressor/optimizer)
Fix for bypass not bypassing limiter (compressor/optimizer)
Apply output gain post-limiter (compressor/optimizer)
Apply output gain post-dry/wet (compressor/optimizer)
Match limiter linked/unlinked to loudness type (compressor/optimizer)
Parameter refresh optimization
Improved peak mode visualizer auto range
Improved target visualization accuracy in some cases

Painting optimization
Condense user interface layout

Minor visual improvements

Fix distribution range type min/max (optimizer)

Support configurable momentary window duration
Fix dithering for some cases (compressor/optimizer)
Option to show/hide parameter change context text bubbles
Tweak transfer function location (compressor)

Input gain mapping for DAWs which support it
Group outlines for better visibility

Fix file open for certain cases

Enable ASIO support in standalone applications

Fix panning startup glitch in certain cases (compressor/optimizer)

Fix tab issues (meter)

Built-in limiter (compressor)
Load limiter settings from target ranges (optimizer/compressor)
Playback loop option (optimizer)
Look and feel improvements

Fix WaveLab crash on startup (compressor/meter)

Improve history scrolling smoothness
Possible fix for manual range flicker

Enable Windows Trusted Signing

Fix crash on export/playback with certain channel count combinations (optimizer)

Add resize handle to plug-in window
Add option to disable velocity sensitive knobs

Fix exporting silence (meter)
Optimize reset, avoid glitching (meter)

Fix annoying combo-box loading glitch

Update JUCE version
Drop shadow for knobs and sliders

Add peak meter w/built-in gain reduction meter (compressor/optimizer)
Apply output gain and dry/wet pre-ballistics (compressor/optimizer)
Remove OfflineHD, not applicable to optimizer (optimizer)

Normalize histograms across panels
Fix bypass applying output gain (compressor/optimizer)
Fix gain reduction rendering during silence (compressor/optimizer)

Support dynamic audio playback changes (optimizer)

Fix axis lines visibility
Load meter statistics per-loudness type

Fix occasional audio glitch on export (optimizer)
Improve button layout (optimizer, meter)
Bring back default delta field

Target range can be set using loudness + range (optimizer)
Smoother bypass via gain ramp matching using ballistics params (optimizer, compressor)
Improve histogram bucket interpolation
Improve peak history rendering
Enable target range combo-box for peak loudness types
Switch to velocity-based rotary dials

Configurable RMS window duration
Move statistics away from axis (meter)

Look-ahead modes now fully functional (optimizer)
Look-ahead improvements for peak and floor (compressor)
Source and target learn now use Integrated + LRA w/400ms startup (compressor)

Fix sample rate issue during export (optimizer)
Flip axis to right side for better visibility

Fix target range presets glitch (optimizer)

Initial release (optimizer)
Switch default settings to look-ahead momentary (compressor)

Improved handling of silence in history metering
Separate loudness type and channel-link
Max range parameter for alternate dynamics types (compressor)
Source learn now yields far more accurate target average (compressor)
Bypass output gain and dry/wet for delta output type (compressor)
More sensible source range presets (compressor)

Look-ahead link modes for attack/release (compressor)

Improved audio quality for low block sizes

Fix ranges loading incorrectly on open/close in some cases

Fix channel-split auto-range jitters
Show normal output history/histogram when delta enabled (compressor)

Add ballistics dither strength parameter (compressor)

Fix input/output loudness alignment
Fix integrated history while stats disabled (meter)

Fix delay compensation, gain ramp glitch (meter)

Fix macOS universal binaries not being built

De-clutter user interface layout
Fix axis when resizing
Performance optimizations
Re-enable AUv3 builds
Sample-accurate ballistics dithering, improved gain ramp (compressor)
Hide look-ahead when no budget (compressor)

Re-fix macOS stand-alone microphone permissions
Disable AUv3 to prevent conflicts and confusion

Small performance improvements
Fix macOS stand-alone microphone permissions

Support gain reduction metering in more DAWs
Fix axis flowing over knobs
Show transfer function even with thresholds disabled

Update JUCE module versions
Super-sampling applies to panel and widgets
Fix coloring on audio hardware settings buttons
Improve font rendering
Manual range fixes

Quick light/dark mode switch, replace theme presets
Fix BPM incorrect evaluation in some scenarios
Improved buttons etc

Gain reduction meter under Layout options (compressor)
Fix shader param 2, other minor improvements

macOS Sonoma support
Performance optimization (meter)
Smoother history rendering w/large block sizes
Report gain reduction and output for some supported DAWs
Shader tweaks for visualizer clarity
Disable delta field by default

Finally, good light themes

Ballistics type parameter supporting natural, inertial, dithered variations (compressor)
Fix target delta visualization (compressor)
Fix host BPM toggle behavior (meter)

Improve range axis ticks/labels
Improve consistency of look-and-feel
Show axis lines setting in layout options
Fix Integrated + LRA calculations (meter)
Fix statistics resetting at wrong time (meter)
Reset meter on timeline discontinuity (meter)
Pause meter on timeline idle (meter)
Automatically show stats during file load (meter)

Improve font and other UI elements
Disable adaptive edges by default

Reduce CPU usage at adaptive window edges
Bring back preset theme hints (themes are better now)

Improve knob layout (compressor)
Improve ballistics when dipping below threshold (compressor)
Improve default presets (compressor)
Improve history/histogram clear behavior
Improve visualizer range chasing
Improve combo box look and feel
Added combined history + histogram raster type
Fix theme changes not refreshing some UI elements
Fix gate low level type behavior
Lots of other minor fixes and improvements

Upgrade JUCE platform version
Fix history output types (meter)

Smoother rendering with large audio buffer sizes
Improve histogram rendering
Improve surround channel type detection
Reset histogram on loudness type change
More consistent channel split visuals
Tone down default delta field settings
Fix Layout Options popup menu coloring in some DAWs

Fix preset delta fields (compressor)
Improved peak loudness types auto-range behavior

Fixes for channel-linked adaptive window measurements
Layout and transfer function improvements (compressor)
Save dynamics type with presets (compressor)
Default to downward compression layout (compressor)

Performance optimization for adaptive window sizes
Performance optimization for RMS calculations
Improve rendering of below range loudness history samples
Fix adaptive window behavior during file load

Introducing adaptive window sizes for LUFS/RMS measurements

Fix panel shading glitch in zoomed mode
Fix channel split histogram threshold
Clear history on loudness type change
Merge output type into 2 toggles (compressor)

Switch knee to bezier interpolation for smoother transitions (compressor)
Constrain effective knee to avoid overlapping knee artifacts (compressor)
Switch to center-threshold knee positioning (compressor)
Panel shader visualization parameters
Recreate all themes based on hue rotation

Fix and improve knee behavior (hermite interpolation) (compressor)
Soft Limiting dynamics type now also utilizes knee (compressor)
Radio button output type for quicker access (compressor)
Reduce flicker on parameter changes

Redesign much of visualizer into GLSL for improved quality and accuracy
Configurable visualization layout
Theme improvements, much improved 'light' theme variations
Visual range presets for manual visualization range
Introducing 'milk mode' parameter and presets (meter)
Fix glitch when loading saved look-ahead settings (compressor)
Overlap target+output to utilize more screen real estate (compressor)
Theme hints removed from presets
Various fixes and improvements

Version 1.x 79 releases v1.9.15-v1.0.0

Replace look-ahead dial w/slider (compressor)
Fix sidechain layout (compressor)
Improve dials layout (compressor)
Fix notification coloring

Drag & drop file open support (meter)
Look and feel improvements

Lots of cosmetic improvements

Improve visualization rect cropping glitch
Update tab for checking latest product versions
Additional minor fixes and improvements

Fix transfer function visualization for gate (compressor)
Detect all loudness types for file i/o (meter)
Improve quick-access layout
Improve panel and other layout elements

Fix look-ahead behavior in some cases (compressor)
Transparent statistics group (meter)

Improve visualizations

Logo update

Add Soft Limiting dynamics type (compressor)
Extend source/target min to -70.0 to match LUFS gate
Adjust default range/threshold settings

Fix license key displaying incorrectly (compressor)

Add makeup/bypass/gate low-level modes for source:target dynamics type (compressor)
Panel texture and shadowing improvements

Update default theme
Various minor fixes

Fix single-value slider thumb offset, improve coloring

User interface improvements
Revert maximum loudness range change, causing issues with sliders

Expand maximum loudness range
Improve Atmos histogram alignment
Fix histogram bucket range end text

Fix auval validation failure
Minor fixes and improvements

Transfer function raster type (compressor)
Fix layout issues, give manual range its own row
Exclude threshold from manual range
Center histogram buckets for channel-linked

History and histogram rendering quality improvements
Fix settings tab parameters not updated in some cases

Add Save as Default preset/theme manager buttons
Fix missing tooltips for preset/theme manager buttons
Fix histogram hold toggle location in visualization tab

Fix missing threshold for alternate dynamic types in peak modes (compressor)
Minor gui improvements

Reduced CPU usage for LUFS calculations
Reduced CPU usage during source/target range changes
Switch from bucket count to bucket size for consistency
Support manual BPM configuration in settings tab
Flip histograms to be vertical
Minor fixes and improvements

Possible fix for OpenGL compatibility issues
Add error message when OpenGL >= 3.2 is not available

Switch OpenGL from compatibility profile to core profile
OpenGL related performance optimizations
Layout improvements, auto/manual range configuration, show/hide thresholds (meter)

Learn function for source/target ranges

Fix default preset/theme migration
Cleanup button corners

Various user interface improvements

Improvements to visualization / threshold rendering (meter)

Improvements to parameter defaults
Display ratio as source/target instead of target/source

Improve texture compatibility

Relocate side-chain to fix layout glitch
Fix normal color slider thumb contrast
Tweaks to panel texture
Improve performance with automation w/editor open
Fix potential deadlock during rendering

Add show thresholds option (compressor)
Various minor fixes and improvements

Fix panel rendering when delta field is disabled

Style toggle buttons
Improved panel texturing

Increase the font size

Loudness axis ticks/labels
Enable minimize/maximize window buttons for standalone
Fix loudness range text box editing (compressor)
Fix ordering on delta histograms (compressor)
Quick-access manual range slider when auto-range disabled (compressor)
Exclude threshold from manual range, except when changing (compressor)

Fix A/B buttons showing over zoomed visualization (compressor)
Fix some text elements not fully displaying
Fix visualization area clicks not always registering
Fix minor layout issues
Textured panel background shader

Textured meters
Quick-access buttons for auto-range & breath residual (compressor)

User interface cleanup

Simplify switching between raster types and dynamics types

Support Dolby Atmos/SMPTE channel orderings

Fix sidechain output! (compressor)

Improve license input visibility (compressor)

Small improvements to context sensitive help (compressor)

Disable output gain during bypass! (compressor)

Support traditional compression/expansion configuration types in addition to source => target (compressor)

Knobs, dry/wet, output gain (compressor)
Aesthetic improvements

Support for Pro Tools
Support mouse wheel for combo-boxes
Condense user interface a little

Support for macOS Mojave (10.14)

Output types: Standard, Bypass, Delta (compressor)
Fix output offset in extreme cases (compressor)

Improved preset save
Fix missing source knee threshold drawing
Fix missing font characters

Default manual reset, with a reasonable general-purpose default loudness range
Default breath residual mode enabled

Aesthetic improvements

Fix mono channels when using stereo loudness types

Fix discontinuities at compression curve extremes (compressor)

Presets & Themes management
A/B comparison buttons (compressor)

Minor graphical improvements

Fix Logic Pro validation failure
Darken the shading a bit outside the visualizer HUD

Improve/fix breath residual feature (compressor)

Support loading from file for analysis (meter)

Many cosmetic & visualizer improvements, configurable bit-depth

Fix mutex double-lock freeze on latency change in Cubase (compressor)

Additional optimizations and re-fix plug-in resize

Fix FLStudio crash on startup (meter)

Fix plug-in resize AU JUCE bug

Reduce overlay redraw overhead

Reduce CPU usage when editor is closed (meter)

Fix rare crash due to text rendering race condition
Fix settings apply/discard buttons sometimes enabled unnecessarily
Apply look and feel to standalone application audio settings dialog
OpenGL performance improvements

Improve sound quality (compressor)
Improve performance (especially meter)
Smoother history rendering
Improve various minor visual elements
Fix stereo RMS reset in certain cases
Support offline license activation (compressor)

Improve performance via more reasonable default block size (meter)
Minor aesthetic improvements

Fixes & improvements to stereo and integrated LUFS
Fix for combo-boxes closing themselves.
Fix for trial/license activation glitches while offline (compressor).

Updated EULA: Added a commitment to provide unprotected builds in the event the business ceases operations or goes offline, ensuring long-term access to the software for licensed users.

Support LRA, improvements to peak/min history (meter)

Initial release of APU Loudness Meter
Bug fixes and quality improvements (compressor)

Fix knee boundary artifacts (compressor)

Eliminate visual discontinuity during history length increase (compressor)
Improve target range behavior (compressor)

Reduce pixel shader artifacts (compressor)

Fix license status text not updating in certain cases (compressor)

Enable sandbox safe for audio unit compatibility (compressor)

Initial release of APU Loudness Compressor

Harmonic Series

18 earlier releases

Current release

Version 1.x 18 releases v1.2.8-v1.0.0

Improve Community Edition, make more consistent and fix graphical issues
Preset manager and factory default configuration for mix settings
Clarify track placement actions and other UI elements

Fix annoying AUv3 regression

Improve visual contrast
Fix application launch in certain situations (macOS)

Sort by Track filename, add separate optional Location column

Support tooltip behavior configuration in CONFIG
Support columns configuration for Library, Mix, Gems
Support continuous playback from any track in Library, Mix, Gems

Optional half/double-time BPM matching across Mix generation and Gem Finder

Playback status on Mix/Gems tabs and next/prev buttons
BPM search and batch editing

Add manual BPM correction with half, double, and detected-value reset actions

Add VST3, Audio Unit, and AAX plug-in formats
Improved folder selection interface

Support playlist import/export
Explicit BPM limits
Support for keylocked mixes
Add Library folder browsing and full-path search
Display and search Finder tags and colors (macOS)

Keep longest compatible route when full route not available

More flexible General Purpose transition profile
Support System theme, prompt at first-run for theme and UI scaling

Update tab for Harmonic DJ
Improvements for mix tab visuals
Add an interactive Mix Map to local and published Mixes

Improve key theory tab
Improve BPM detection and testing

Support importing collection from mix URL
Improve Library loading behavior w/detached drives

Support UI Scaling for Harmonic DJ

Fix missing standalone launch option for Windows installer
Link externally hosted Mix recordings with embedded SoundCloud, Mixcloud, and YouTube playback on published Mix pages
Make transition-profile selection respond immediately in large libraries

Initial release of APU Harmonic DJ