LAWO POWER CORE User Manual page 135

9. Audio Mix Engine
VUs
VUs may be configured using the same options as for PPMs.
The meter scale and characteristics are modelled on an analogue VU.
Loudness Metering
Loudness Bargraph (as an Add-On to a PPM)
From Version 4.2 software, the console supports loudness metering conforming to the ITU-R BS1770.
Loudness meters may be assigned to a channel (sapphire only), main meter, to the source in access or DMS
meter, and work in parallel to the regular PPMs. See the
Loudness Metering Bargraphs
When using bargraphs, a single bargraph represents the average energy of the summed component channels:
mono, stereo or surround. The average is measured using either a Momentary (400ms sliding window) or Short
term (3s sliding window) integration time.
The bargraph colour indicates whether loudness is above or below the Target Level. Scale markers indicate a
tolerance of +/- 1 LU/LK.
Integrated Loudness Measurement
The integrated loudness measurement provides a very useful tool for measuring loudness over long periods of
time. For example to measure the loudness of a complete programme transmission.
The measurement can usually be started, stopped, paused or reset from buttons beside the display. In our
example, the integrated loudness measurement is reading -23 LUFS (Loudness Units Full Scale).
Loudness Range Measurement (LRA)
The loudness range measurement is similar to the integrated measurement, described above, but is gated (at -
70dB LUFS) to exclude silence from the measurement.
Use the Loudness element in VisTool Editor to configure Loudness metering.
POWER CORE User Manual
Integrated Loudness Measurement
PPM assignment options for details.
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