10.6

Table Of Contents
162Logic Pro Effects
Logic Pro Loudness Meter
Loudness Meter shows the momentary, short-term, and integrated loudness levels.
Loudness indicates the perceived level of a signal that is indicative of human hearing,
making it a useful reference tool when mixing or mastering. Loudness Meter conforms
to the AES 128 specification.
Loudness is measured in Loudness Units, relative to Full Scale (LUFS). Each LU is
equivalent to one decibel.
Loudness Meter parameters
M, S, and I fields and meters: Indicate the current momentary, short-term, and
integrated signal levels of incoming program material. The signal level for each
channel is represented by a blue bar. Signals approaching the 0 dB level (target
level) are represented by a yellow bar. When the level exceeds 0 dB, the portion
of the bar above the 0 dB point turns red.
Target level line: Drag to set a target level.
LU Range field: Indicates the loudness range during measurement (using the Start/
Pause button).
Integrated field: Indicates the integrated loudness level during measurement (using the
Start/Pause button).
Start/Pause button: Turn on to analyze and show the Integrated Loudness and the
LU Range for a portion or the full length of the material. Pause retains the current
LU Range and Integrated values.
Reset button: Clear all values.
View pop-up menu: Choose a Horizontal or Vertical display and set a size.
Note: You can also set a size by dragging the lower corners of the plug-in window.