Acon Restoration Suite

Home Audio Software Audio Effects Plugins Acon Acon Restoration Suite 2
DeNoise 2, DeHum 2, DeClick 2, DeClip 2
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Mac & Win
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Restoration Suite 2 — a Giant Leap in Audio Quality

Restoration Suite 2 is a suite of four cutting edge plug-in for audio restoration and noise reduction:


DeNoise 2 is a plug-in designed to reduce noise such as hiss, wind noise, buzz and camera noise. The noise can be reduced automatically in the adaptive mode or after measuring the characteristics of the noise in the noise profile mode. New in version 2 are dynamic noise profiles that capture the dynamic properties of the noise so that noise that fluctuates over time, such as wind noise, can be effectively reduced. The new algorithm has also been greatly improved and is now even less prone to typical de-noising artifacts.

DeHum 2 targets hum and buzz typically introduced by poorly grounded electrical equipment, but also other tonal noise sources like electrical motor noise. The hum detection algorithm has been improved in version 2 and there’s now a new Scan button that automatically fine tunes the fundamental hum frequency.

DeClick 2 is designed to remove impulsive noise such as clicks, crackle and thumps. These distortions are frequently encountered on LP and 78 RPM records, but also occur in digital recordings due to drop-outs or distorted data packets. DeClick 2’s thump reduction works also effectively on vocal recordings with unwanted plosives. The algorithm has been improved in version 2 and is now less prone to reducing attacks and transients in the wanted signal.

DeClip 2 restores audio recordings distorted by analog or digital clipping with an improved algorithm.

New in Version 2

All four plug-ins have received major improvements both in the processing algorithms and the user interface compared to version 1. DeNoise 2 introduces the novel dynamic noise profiles that help reducing noise that varies randomly over time, such as wind noise or rustle from lavalier microphones. Where the earlier versions merely captured a static noise print with time-constant noise levels, the dynamic noise profiles capture statistics from the noise to be reduced. The noise suppression algorithm then estimates the most suitable noise threshold curve for the noisy input signal using the measured statistics.


DeNoise 2, DeClick 2 and DeHum 2 now support Mid/Side (M/S) processing, which can reduce unwanted fluctuations in the stereo image. The core algorithm in DeClick 2 received major improvements and now better preserves transients and can be pushed to higher click and crackle sensitivities without introducing artifacts.


DeHum 2 has a new automatic fine-tune button that triggers automatic estimation of the hum noise frequency. The hum tracking and suppression have also been improved. DeClip 2 was improved in terms of audio quality and now offers even more impressive reconstruction of clipped signal peaks. All the plug-ins in the suite now support surround and immersive audio formats up to 7.1.6 channels.


Acon Digital Restoration Suite 2 is available as VST, VST3 or AAX for both Windows and Mac or as AU plug-ins for Mac. There are 32 and 64 bit versions for Windows and the Mac version is 64 bit.

Platforms and Plug-in Formats

Available as VST, VST3 or AAX plug-ins on PC (Windows)

Available as VST, VST3, AAX or AU plug-ins on AppleMacintosh (OS X)

The Windows is available as native 32 bit or 64 bit versionsand the Mac version is 64 bit

Supports sampling rates up to 192 kHz

Supports surround and immersive multi-channel audio up to7.1.6 channels

Acon Digital DeNoise 2

Advanced algorithms reduce stationary noise efficiently withminimal impact on the wanted material

Reduces noise in adaptive mode or based on noise analysis.

Novel dynamic noise profiles makes it possible to removenoise that changed rapidly over time

Transient detection ensures that transients remain untouchedthroughout the noise reduction process

Effective temporal smoothing reduces musical noiseartifacts

Optional M/S processing

Target broadband and tonal noise or optionally broadbandonly

Graphical representation of input frequency spectrum and thenoise profile

Frequency emphasis filter

High and low shelving filters with variable slopes (-3 to-96 dB / octave)

High and low peak filters with adjustable bandwidth (0.1 to3.0 octaves)

Graphical representation of frequency response

Editing of filter settings through handles in the frequencyresponse curve

Solo Noise mode allows you to listen to the removed signal

Acon Digital DeHum 2

Remove hum and buzz with minimal loss of the wanted signal

Novel sinusoidal re-synthesis algorithm (preserves wantedsignal to a much larger extent) or conventional notch filter mode

Adaptive mode allows removal of hum signals with a fluctuatingfundamental frequency

New automatic fine-tune button looks automatically scans thefundamental frequency

Removes up to 96 harmonics

Optional M/S processing

Option to target only odd harmonics

High resolution spectrum analysis of the input signal

Visual indication of the estimated fundamental frequency aswell as the harmonics

Solo Hum mode allows you to listen to the removed signal

Acon Digital DeClick 2

Seperate detection and restoration of clicks, crackle,thumps and plosives

Very accurate detection of click start time and durationensures minimal impact on the wanted material

Improved algorithm allows higher sensitivities withoutartifacts

CPU efficient algorithm

Optional M/S processing

Visual curve meters show the clicks and crackle removalrates

Residual signal mode allows you to listen to the removedsignal

Acon Digital DeClip 2

Reconstructs peaks distorted by analog or digital clipping

Improved algorithm over version 1.x

Separately adjustable upper and lower threshold values

Optional upper and lower threshold lock simplifies theworkflow in the case of symmetrical clipping

Graphical representation of the input and output levelhistograms makes it easy to set the threshold values and monitor therestoration process visually

Threshold values can be adjusted directly from the levelhistograms by dragging upper and lower threshold handles

PC Version (Windows)

Windows 7 / 8.x / 10

A host application that is compatible with VST, VST3 (32 bitor 64 bit) or AAX (Pro Tools 11 or higher)

Intel Core i3 or AMD multi-core processor (Intel Core i5 orfaster recommended)

1366 x 768 display resolution (1920 x 1080 or higherrecommended)

1 GB RAM (4 GB or more recommended)

1 GB free HD space

Macintosh Version (OS X)

OS X 10.8 or later

A host application that is compatible with AU, VST, VST3 orAAX (Pro Tools 11 or higher)

1 GB RAM (4 GB or more recommended)

1 GB free HD space

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