Crazy little thing called LUFS
John Heraty, BBC broadcast technology trainer, explains why the PPM may now be unfit for purpose
Sound engineers have used the Peak Programme Meter (PPM) to measure audio levels for more than 70 years. In this presentation, John Heraty shows how the PPM is both too fast and yet too slow to do the job that’s now being asked of it. It does not give an easy indication of the loudness of the audio, which is related to its average energy, nor does it show the true level of fast transient peaks that can cause distortion.
“We don’t all have calibrated ears as per the EBU articles.” – John Heraty
John describes how loudness meters and the EBU R128 loudness specification solve these problems.