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Powerful, transparent True-Peak limiting you can 'set and forget', with the assurance of True-Peak compliance at all times.
Space-saving compact mode for maximum flexibility.
Upgrading to version 2? Learn more
World class, broadcast quality limiting is an essential requirement for any audio production, and the latest standards also demand true-peak compliance. ISL delivers both, giving you superb sound with complete confidence about meeting the standards.
"NUGEN products have changed my life. My colleagues and I no longer spend four hours trying to get a show into spec."
Cheryl Ottenritter | Ott House Audio
No need to second guess your sample-peak limiter time and again, or deliberately increase headroom to avoid a downstream problem. Just dial in your true-peak limit and let ISL take care of the rest.
Pristine quality true-peak limiting
ISL is a transparent look-ahead limiter designed to allow you to get on with creative audio production while it takes care of true-peak compliance for you.
ISL uses the standardised true-peak algorithms of ITU-R B.S. 1770 and related standards (including Apple ‘afclip’ true-peak detection), and is suitable for the control of audio for Post Production and Broadcast applications. True-peak limiting can also be used to ensure that down-stream Codecs (mp3, AAC etc.) do not introduce distortion into the signal.
Powerful Processing and Visualisations
With unique Steering and Ducking meters, ISL2 guides you to the perfect settings. Whether you are preserving directional integrity, atmospheric ambience or taming a surround centre channel, ISL2 gives you the information and control you need to achieve your objective with ease. New processing enhancements assess the incoming audio for frequency content and automatically take care of those minor adjustments required when LF content drives the limiter, delivering increased transparency whilst maintaining our renowned reputation of intuitive operation.
Power Compensated Dither options
As of version 2.7, ISL 2 now features a unique Power-compensated dither algorithm. If dither is engaged, ISL 2 automatically compensates for maximum power of the dither, ensuring true-peak level after dither has been applied which may not be the case when using traditional final stage dither algorithms. This safety feature maintains compliance criteria and codec protection automatically, meaning that audio does not need to be checked again after the dither process.
For Pro Tools HDX power users, ISL 2 DSP is available to take full advantage of Avid's HDX hardware.
- Post Production & Broadcast audio
- Audio Mastering
- Loudness compliance
- afclip intersample clip monitoring
- Protection for downstream compression
- Preserving quality for streaming/podcast
- Inter-sample clip management
Mike Felton | 'Later... with Jools' BBC TV
"I have been using VisLM and LM-Correct, along with NUGEN Audio's ISL real-time true-peak limiter, for almost two years and can say without hesitation that they are critical elements in my audio mixing workflow for the Jools show."
Mix Magazine | Brandon Hickey
"What was really impressive, though, was that I could dig deep, reducing gain significantly, and still the plug-in stayed incredibly clean."
Richard Addis | Halo Post
"After evaluating several products, we have outfitted all eight HALO mixing rooms with NUGEN Audio's Loudness Toolkit, consisting of the VisLM-H meter, LM-Correct quick-fix tool, and ISL true peak limiter. "
Gary Zacuto & Garrard Whatley | Shoreline Studios, CA
Gary & Garrard explain how the ISL True Peak Limiter is fundamental to successful content delivery in multiple formats for the worlds top game trailers, plus TV & film sound design.
Transparent True Peak Limiting
- Adjust adjustable look ahead
- Two stage, non-linear adaptive algorithm
- Adjustable channel linking
- Includes Apple afclip True Peak option
- Compatible with ITU-R BS. 1770
- True brick-wall limited output
- Mono through 7.1 surround compatible
Clear, intuitive operation
- Intelligent adaptive algorithm
- Clear metering
- Multiple diagnostic listen modes
- Accurate, standard compliant I/O metering
- Precise direct numeric maxima
- Adjustable ballistics and colour splits
Click here to download product manual
ISL 2 | Introduction Tutorial
Short tutorial showing how to use ISL to create a True-Peak compliant mix. Also describing some of the new features in version 2.
ISL 2 | Channel Linking
Short tutorial demonstrating the use of channel linking to control steering and ducking
An Introduction to True Peak Limiting | Pt 1
Audio dubbing editor and mix engineer Mike Thornton explains True Peak limiting and gives an overview of the ISL interface and operation.
An Introduction to True Peak Limiting | Pt 2
Mike Thornton explains the practical application of ISL in a number of different contexts, including some suggested settings as a quick-start guide to operation.
ISL User Interface 1
ISL | Stereo user interface
ISL User Interface 2
ISL | 5.1 Surround user interface
Dr. Paul Tapper | AES Lecture on True Peak
Dr. Paul Tapper, co-founder of NUGEN Audio, explains True-Peak measurement during a lecture at the Audio Engineering Society
Our loudness products are compatible with all recommendations and guidance based upon the international standard ITU-R B.S. 1770, revisions 1, 2, 3 and 4 including:
ATSC A/85 (CALM ACT)
EBU R128 S1
We support AAX, VST, VST3, AU and AudioSuite in both 64-bit and 32-bit versions. RTAS is also available as 32-bit only.
AAX DSP version supports 7.1 audio up to 48Khz and 4 channels at 96kHz.
Minimum System Specification
Mac OSX 10.7.x, 512 MB RAM
Windows (64 bit) Vista or above, 512 MB RAM
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Mix & Mastering