NUGEN Audio ISL — From the Main Stage to the Airwaves

By in Live Sound, Music Creation

NUGEN Audio ISL inter-sample true-peak limiter

Transparent, ITU compliant, Broadcast Safe audio straight from the VENUE | S6L

Using the same technology that established ISL as a bullet-proof brick-wall limiter for broadcast compliance in film and television worldwide, NUGEN Audio have now introduced a new DSP version, bringing ISL’s acclaimed accuracy, sonic clarity and transparency to Avid’s VENUE | S6L System. Whether you’re streaming live to the internet, outside broadcast, or recording direct to disc, your mixes can now benefit from the assurance of a world class standard.

The truth about limiting

For several years, inter-sample limiting has been a requirement for broadcast compliant audio, and many online digital distribution services, such as the Mastered For iTunes program. But what is inter-sample limiting and why is it important?

Traditional limiters operate on what are known as sample peaks, which is generally fine if your audio will always remain on the same high quality system with which it was made. However, if you plan to distribute that sound elsewhere in the digital domain (eg. Live broadcast, facebook stream, AAC file etc.) then problems can arise. This is because although your sample peak limiter can ensure that each sample does not go above 0dBFS, the underlying analogue waveform may be higher. As soon as your audio leaves the desk, these inter-sample peaks, known as True-Peaks are critical, and can cause distortion if they go above zero. ISL can handle these peaks, allowing you to set a True Peak maximum level with confidence to ensure your downstream audio remains at the very highest quality.

Live broadcast streams

For television networks, True-peak compliance is a delivery specification. With ISL 2 you can send ITU-R B.S. 1770 True-peak compliant audio directly from the S6L. No need for 3rd party post-limiting. You remain in charge, maintaining your mix quality from Stage to Studio.


Live internet streaming

Audio sent over the web is data compressed to reduce bandwith requirements using compression codecs such as AAC and Ogg Vorbis. Compressed live internet streams suffer distortion when attempting to handle inter-sample overs. With ISL on your output bus you can control inter-sample clips to ITU and AES recommendations ensuring a high quality internet ready feed.


Live recordings

The world of live audio production is spontaneous, and there is no going back. Sample peak limiting cannot detect sudden inter-sample peaks and is vulnerable to unexpected transients. Protect your digital output against inter-sample over-load, producing clear recordings ready for duplication and codec compression in real-time. Studio-ready and perfect for instant distribution, preserving your artistic intent all the way down the line.


Later With Jools

With almost 300 shows since 1992, the BBC Later with Jools program is something of an international institution. Famous for it’s live and recorded editions, producing audio for the series requires the very best tools and engineering knowledge. Having worked as sound supervisor on the show for 22 years, Mike Felton knows he can trust ISL.

“ISL is a set-and-forget plug-in that works tirelessly in the background to ensure true-peak compliance – a brilliant solution.”

Mike Felton  | Later with Jools, BBC TV

Quiet confidence

ISL is a transparent limiter designed to allow you to get on with creative audio production while it takes care of true-peak compliance for you. With a unique TPlim setting, ISL automatically takes care of ratio and threshold settings to deliver end-of-chain limiting without the need to deliberately over-compensate for inaccurate sample peak plug-ins or worry about downstream problems.

Powerful processing and visualizations

With unique Steering and Ducking meters, ISL2 guides you to the perfect settings. Whether you are preserving directional integrity or atmospheric ambience 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 with elegant and intuitive operation.

With full DSP integration and page table support, ISL 2 DSP for Avid VENUE | S6L systems is an essential addition to your live environment. Available for download now in the Avid Store.


About NUGEN Audio

For more than a decade NUGEN Audio has provided some of the world’s most advanced audio solutions for metering and audio control. Our customers include many of the most recognised brands and biggest names in music production who rely on the quality and reliability of our plugins every day.

But don’t just take our word for it – check out a demo. ISL is available for a free fully functioning 14 day demo so next time you are preparing for the road, make sure you check out our options for enhancing your Avid VENUE | S6L live sound system.

VENUE | S6L Now Available

The next stage in live sound is here—with the award-winning VENUE | S6L system, you can take on the world’s most demanding productions with ease.

Jon Schorah is a founder and Director of NUGEN Audio, developer of pro-audio plug-ins for Post Production and high end audio applications.