Simple, Strategic

AudioTools Loudness Control Server is a flexible and agile solution that is expandable with additional modules as needs dictate. Each installation is custom built, a bespoke system tailored to your company’s requirements. Though our Job Wizard makes for easy job definitions, with AudioTools Loudness Control Server you’re not locked into interaction only through a fixed user interface. In fact, a UI is optional.

You can interact with AudioTools Server in a variety of ways, including SOAP, XML, your own GUI-based Client or our Job Wizard


Watched folders are one simple way to run your jobs, or you can integrate AudioTools Loudness Control Server into your existing DAM, CMS, DBM environment, or via a simple, well defined web services interface. AudioTools Loudness Control Server will also run independently, an island of concurrent, consistent and tireless audio expertise.

Some automated asset processing systems require you to purchase features and functionality that you don’t need. AudioTools Loudness Control Server, being a highly scalable, modular system, can be augmented and expanded as your business needs and requirements change.

AudioTools Loudness Measurement

Loudness control begins with measurement, and AudioTools Loudness Control Server supports all international standards, including ITU-R BS.1770-1, BS.1770-2 and EBU R 128 (2011) standards, and the ATSC’s Recommended Practice A/85. Evaluation using ITU Program Loudness, Maximum True Peak Level, Maximum Momentary Loudness, Maximum Short Term Loudness, EBU Program Loudness and Loudness Range are all included.

For the increasingly important assessment method that uses dialog as an anchor element, AudioTools Loudness Control Server incorporates Dolby Dialogue Intelligence for highly accurate, speech-anchored measurement. Dolby Dialogue Intelligence can be used exclusively or, in conjunction with overall or broadband program anchoring to meet your exacting assessment needs.

Mono, stereo and multichannel PCM essence can be measured, as well as multiple programs such as 5.1 + 2 or any configuration you choose, while programs wrapped within QuickTime and MXF containers can be extracted without unwrapping or modifying the video essence. In addition to infinite or overall measurement results across the entire asset, loudness measurements throughout the file are reported.

AudioTools Loudness Adjustment

Loudness measurement is useful for determining whether an asset is compliant. However, what if your assets are not acceptable? AudioTool Loudness Control Server offers a wide range of tools and solutions.

Though jobs and workflows can be configured as measure-only, measure and correct or, a combination of measure, correct and QC, processing often consists of measurement with correction. Program Loudness plus True Peak Limiting, combined with Maximum Momentary and Maximum Short Term limiting, are part of many broadcast delivery specifications.

Using the results obtained from measurement steps, the Loudness Adjustment module can, if desired, apply a gain correction to the incoming essence to reach the targeted Program Loudness value. If a file already falls within a predefined acceptable range, the essence remains unchanged. You can also define a tolerance which, if not met, causes the material to be quarantined.

Rather than forcing the material to fit within a prescribed dynamic range and amplitude envelope, all adjustment are made based on each program’s individual characteristics, what the ATSC refers to as an “agile” workflow.

AudioTools Loudness Adjustment can adjust according to the following parameters:

  • Program Loudness ITU & EBU R 128
  • Loudness based on Dolby Dialogue Intelligence
  • Maximum True Peak
  • Maximum Short Term Loudness
  • Maximum Momentary Loudness
  • Loudness Range
  • Flexible dynamic range correction
  • Imbedded metadata via accurate metadata updating

Dynamic range and Loudness Range can be adjusted using a variety of tools, included multiband dynamics, a broadband Program Range adjustor, a combination of level adjustment and limiting, or any combination of your choice. If Program Loudness and/or Loudness Range is chosen for adjustment, Maximum True Peak Level and Maximum Momentary or Maximum Short Term Loudness Levels can be limited to specified or relative target values. The Loudness Adjustment module can report adjustment status to an external automation system, so special cases can be handled appropriately.

Metadata support is provided for correction based on content-related presets, such as genre or trusted source. AudioTools Loudness Control Server is also able to simultaneously deliver for multiple delivery platforms, such as mobile and satellite.

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