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R128Balance is a dynamic loudness normalisation technology designed to ensure that audio recordings are played back at a consistent loudness level. Developed by the International Telecommunication Union (ITU), it is an extension of the R128 standard for measuring loudness.

The primary goal of R128Balance is to reduce the dynamic range of audio recordings, making them more consistent and easier to listen to. This is achieved by adjusting the peak level of the audio so that it is no louder than specified limits. These limits are typically measured in LU (Loudness Units) relative to full scale.

In broadcasting, R128Balance is used to ensure that programmes are played back at a consistent loudness level, improving the overall listening experience. The technology also helps to prevent loud commercials and announcers from overpowering dialogue and other programme elements.

R128Balance is different from traditional loudness limiting techniques, which often result in a "brickwalled" sound where the level is artificially limited to prevent clipping. R128Balance instead uses a more nuanced approach, dynamically adjusting the level of the audio in response to changes in programme content.

The use of R128Balance is becoming increasingly widespread in broadcasting and online audio platforms, as it helps to provide a consistent listening experience for viewers and listeners. It is also used in audio post-production to ensure that programmes, films, and other audio content are mastered at the correct loudness level.

R128Balance is an important development in the field of audio broadcasting and production, helping to improve the listening experience and protect the hearing of audiences.