Integrate Loudness
In Any (Or All) Your Project(s)

Many broadcasters have implemented loudness normalisation according to EBU R128 and ATSC A/85 recommendations. Manufacturers of radio and television broadcast automation systems are now challenged to add loudness functionality to their products. Grimm Audio’s LevelAPI OEM library helps them to shorten the time to market considerably.

LevelAPI is designed to be the backbone
of all your loudness normalising tasks

With LevelAPI, compliance to EBU R128 and ATSC A/85 can easily be achieved in all major programming environments like C/C++, Java and LUA. LevelAPI comes as a programming library in the form of a .dll (Windows) or .so (Linux) file, which can analyse and normalise audio files and streams. An automatic peak limiter of high quality helps to avoid clipping. LevelAPI offers the developer an easy integration of quality control and loudness normalising processes. The Grimm Audio team offers support in implementing LevelAPI and gives access to its deep knowledge about loudness normalisation, being led by one of the founders of the EBU R128 recommendation, Eelco Grimm.


  • loudness normalisation API
  • state of the art peak limiter
  • Windows .dll file
  • Custom build Linux .so file
  • 32 and 64 bits support

The libLevelAPI and the example are build on Linux Version 2.6.32-5-686 (Debian 2.6.32-35) gcc v 4.3.5 (Debian 4.3.5-4). Linux Version CentOS i386 & x64. Custom builds available.

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