ISL 2 by NUGEN Audio true-peak limiter plugin interface

ISL 2: True-Peak Limiter Plugin by NUGEN Audio Free Download

Rated 4.8/5 on Plugin Boutique (9 ratings)

ISL 2 is a look-ahead true-peak limiter plugin by NUGEN Audio for broadcast, post production and mastering. It uses ITU-R BS.1770 true-peak detection to help audio meet loudness and true-peak standards.

VST3VST2AUAAXRTASWindowsmacOS32-bit only

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Free trial available from the developer

01Overview

ISL 2 is a Windows and macOS effects plugin in the limiter category, available as VST3, VST2, AU, AAX and RTAS. Its focus is transparent limiting with true-peak control, so you can set a true-peak ceiling and rely on the limiter to keep output compliant. NUGEN Audio describes it as suited to post production and broadcast work, and it also covers mastering, streaming and protecting material before a downstream codec.

Best for

Broadcast audio limiting
Loudness compliance
Post production mixing
Mastering for iTunes
Protecting downstream codecs
Surround centre channel control

Developer: NUGEN Audio
Category: Limiters
Store: Plugin Boutique

02Key features

What you get

True-peak limiting based on ITU-R BS.1770 algorithms
Mastered for iTunes true-peak detection option
Look-ahead limiter with adjustable look-ahead time
Two-stage non-linear adaptive limiting algorithm
Adjustable channel linking
Mono through 7.1 surround compatible
Steering and Ducking meters
Accurate standard-compliant I/O metering with numeric maxima

03In depth

True-Peak Limiting for Standards Compliance

ISL 2 uses the standardised true-peak algorithms of ITU-R BS.1770 and related standards, including Apple's Mastered for iTunes true-peak detection. Instead of raising headroom to avoid intersample overs, you dial in a true-peak limit and let the plugin manage the peaks.

The limiter is look-ahead and described as transparent. Adjustable look-ahead, a two-stage non-linear adaptive algorithm and adjustable channel linking give you control over how it reacts to the material. True brick-wall limited output keeps the ceiling in place.

Metering and Processing Controls

ISL 2 includes Steering and Ducking meters that show how the limiter is working, which helps when preserving directional information, ambience or a surround centre channel. Its processing assesses the incoming frequency content and adjusts for low-frequency material that drives the limiter.

I/O metering is standard-compliant and shows precise numeric maxima. Ballistics and colour splits are adjustable, and multiple diagnostic listen modes help you find where the limiting is happening.

04Specs

Will it run?

Formats, systems and requirements as listed by Plugin Boutique. Missing details are left out, not guessed.

Developer	NUGEN Audio
Type	Plugin
Category	Limiter
Formats	VST3, VST2, AU, AAX, RTAS
Operating systems	Windows, macOS
Architecture	32-bit only
Free trial	Yes

05FAQ

Questions, answered

What formats and operating systems does ISL 2 support?

ISL 2 is available as VST3, VST2, AU, AAX and RTAS and runs on Windows and macOS. AAX, VST, VST3, AU and AudioSuite are offered in both 64-bit and 32-bit versions, while RTAS is 32-bit only.

Does ISL 2 support true-peak limiting?

Yes. It uses the standardised true-peak algorithms of ITU-R BS.1770 and related standards, and includes an iTunes True Peak option for Mastered for iTunes detection.

What are the system requirements for ISL 2?

The listed requirements are Mac OS X 10.6.x with 512 MB RAM and Windows XP or above with 512 MB RAM. The AAX DSP version supports 7.1 audio up to 48 kHz and 4 channels at 96 kHz.