What Should (or Shouldn’t) a Loudness Tool Do?

What Should a Loudness Tool Do?   The requirement is to be able to analyse the audio, check for compliance and attenuate / normalise without any degradation of audio quality, and where audio is embedded within a video source signal or file, video is in no way degraded.   1. Measurement First of all any …

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From the summer of love to the summer of hope…

It was 50 years ago that Sgt. Pepper called the band to play… and the result was one of the greatest albums of all time. That was the summer of love.   This year has had its dark moments, but some of the recent events fill me with the thought that it will be the …

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Loudness: What is Gating?

What is Gating? Some audio clips may have a prolonged period of silence or low volume sound, which can skew the loudness calculation, resulting in any sound in the clip being altered to be too loud. For example, a nature documentary may have long periods of silence where animals are shown. These extended quieter periods …

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Applied Technology: Dolby E Workflow – From Content Creation to Playout

Dolby article in The Broadcast Bridge by Emotion Systems' MC Patel

From creation to broadcast to transmission, audio content requires similar processes but with different variations depending on where the content is in the workflow. This article will briefly discuss content requirements, workflows, and the role that Dolby E has as a part of this transmission chain. In each case, Dolby E based processing and other …

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EBU R128s1 Loudness Compliance (Eff and Engine trial download)


Recent changes in loudness recommendations by the EBU (R128s1) means that your short form content may need to comply to short term loudness. We have written a new loudness processor that allows program loudness and true peak compliance, and is also R128s1 compliant. The new processor also has an option for loudness range processing. We’d …

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Perfect Pitch for Audio Frame Rate Conversion

Program Loudness and loudness compliance for post and boradcast televsion by using automated file based processing for audio

A lot of high-quality content is shot at 24 frames a second and then converted to 25 or 30/29.97 frames a second for distribution. A convenient way to preserve quality is to do this as a speed change to 25, and 3:2 pull down for 30/29.97. This way, the video quality is preserved.   But, …

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Iain Davies

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