Loudness Compliance: The 10-Point Checklist

10 Point Loudness Compliance Checklist from Emotion Systems - Programme (Program) Loudness Compliance for post, television broadcast, and playout

Historically we had peak-level based (PPM) audio measurement and the compliance spec said we were not to pass a certain PPM level. Commercials exploited this by keeping the sound close to the maximum peak, and as a result, it was louder.   The new loudness specification Over the last few years, the audio specification has …

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Engine Version 7 at IBC 2017

Iain on Engine 7 keyframe

For those of you who were unable to visit IBC, Iain has made a short video showing the Version 7 release of Engine, and the newer Engine features that are now available in the product.

Why are Loudness and PPM important?

Why are Loudness and PPM important? Loudness and PPM are used as references to control the maximum audio levels in broadcast material. The issue is that a program and the commercial that follow it may have the same maximum PPM levels, but the commercial will frequently be perceived as louder. Having a loudness measurement means …

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IBC – of gin and joints

I was reading the Devoncroft report and noted a quote that read, “We want as fine-grained media services as possible… it’s very common to have a company say ‘we do it all’… we can QC the video, transcode it, caption alight it, normalize the audio… What we don’t want to do is feed things into …

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Automating iTunes authoring, mastering, and the new compliance requirements

If you authoring and mastering iTunes and using -24 LUFS as per the new spec, you may want to read on. (Here’s a link to Apple ‘s spec for ProRes Audio Channel Data Assignment and Levels, in case you’d like more detail.)    We’ve heard that a lot of the clients who require transmission ready files also need …

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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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Iain Davies

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