Loudness Meter

Shows/Hides the Control Room section.

Shows the Integrated value as a triangle in the left meter scale and the Short-Term value as a triangle in the right meter scale.

Activates the loudness measurement.

Switches the meter scale between LUFS (absolute values) and LU (relative values).

Allows you to specify a threshold value for the Momentary Max., the Short-Term, the Integrated, and the True Peak clipping indicators. If values above the set thresholds are detected, the corresponding indicators turn red.

You can switch the loudness meter between the EBU +9 scale and the EBU +18 scale.

To reset all values on playback start, activate the Reset on Start option.

Resets all loudness values.

Shows the maximum value of all momentary loudness values, based on a time window of 400 ms. The measurement is not gated.

Shows the maximum value of all short-term loudness values, based on a time window of 3 s. The measurement is not gated.

Shows the average loudness measured from start to stop. The period of measurement is shown in the Time display. The recommended value for the integrated loudness is -23 LUFS. This absolute value is the reference point for the relative LU scale where -23 LUFS equals 0 LU.

Shows the dynamic range of the audio measured from start to stop. This value helps you to decide how much dynamic compression you can apply. The recommended range for highly dynamic audio, such as film music, is 20 LU.

Shows the true peak level of the audio. The maximum permitted true peak level in production is -1 dB.

Shows the duration of the integrated loudness measurement.