Invisible Limiter G2

Table of Contents

Overview

Focus on Limiting, Once Again

Loudness war is over, limiting just for loudness is no longer an issue, however, how we should limit signals is still an issue. Limiters continue to play one of crucial roles in mastering process, and become a more aggressive part in sound tuning.

Invisible Limiter G2 is focusing to allow precise control to user. Its basic algorithm is inherited from the predecessor Invisible Limiter, but there are a lot of enhancements, such as reduction shape controls, softknee, channel link, manual attack/release time, dither, side chain filter, etc. You will get huge amount of freedom.

Easy Mode

The freedom of control also brings complexity and difficulties in learning. Invisible Limiter G2 offers “Easy Mode”. In this mode, the limiter shows only essential controls for rapid learning and practical use.

Unity Gain Monitoring

Loudness affects to perception. Louder sound often brings better impression for listeners, but the same effect leads engineers to a wrong sound judgement.

The idea of Unity Gain Monitoring is simple – putting negative gain on output stage. The amount of negative gain is same as makeup gain. Using Unity Gain Monitoring, the makeup gain is cancelled and you can focus the sound difference through limiting.

Oversampling

Non-oversampling peak limiters have a problem on detecting peaks. The figure below shows peak detection of limiters. Non-oversampling(1x) samples and oversampling(8x) samples result a same analog waveform. Non-oversampling(1x) limiters cannot detect a true peak in resulting analog waveform. In contrast, oversampling(8x) limiters can detect and process the true peaks.

Note that Invisible Limiter G2 is true peak aware, but it is for sound, not for measurement. The limiter does not guarantee conformance to any true peak measurement specification.

There is an obscure but important improvement in oversampling low-pass filter. This kind of filter aims to remove ultrasonic frequencies in the middle of oversampling process. In Invisible Limiter the filter has achieved 70 to 80dB reduction, the corresponding part in Invisible Limiter G2 does 160dB.

Block Diagram

Overall Structure

Limiter Part

Product History

Version 1.15.3 (2022-09-09)

CLAP plugin format is now supported.

Version 1.13.3 (2022-01-27)

Added Modern V mode.

Version 1.11.4 (2021-03-15)

Added Modern IV mode.

Add AVX2 Installer.

Version 1.10.2 (2020-03-01)

CPU load is reduced to 55% of previous version.

Version 1.9.6 (2019-07-16)

Added Modern III mode.

Version 1.8.2 (2017-12-28)

Add new factory preset.

Version 1.8.1 (2017-07-06)

Added Modern II mode.

Support up to quality 10.

Support up to 12 channels symmetric I/O.

Reduce CPU load by 30-40%.

Version 1.8.0 (2016-05-20)

Initial release.