10.6

Table Of Contents
166Logic Pro Effects
Logic Pro MultiMeter Level and Loudness Meters
Level Meter displays the current signal level on a logarithmic decibel scale. The signal level
for each channel is represented by a blue bar. Signals (above the target level) approaching
the 0 dB 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.
RMS and peak levels are shown simultaneously, with RMS levels appearing as dark blue
bars and Peak levels appearing as light blue bars. When the level exceeds 0 dB, the
portion of the bar above the 0 dB mark turns red.
Peak and RMS fields: Peak and RMS values are displayed numerically (in dB increments)
above the Level Meter. Click the display to reset values.
Loudness Meter shows the momentary loudness level. 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. MultiMeter provides two indicators above the Loudness Meter.
LU-I field: Loudness Unit-Integrated, which indicates the perceived level from start to
end of the program material.
LU-S field: Loudness Unit-Short term, which indicates the perceived level of the most
recent 3 seconds of program material.
Level Meter parameters
Level pop-up menu: Choose how levels are displayed from Peak, RMS, Peak & RMS,
True Peak, or True Peak & RMS characteristics.
The two RMS modes show the effective signal average and provide a representative
overview of perceived volume levels.
The True Peak options display interpolated sample values.
The Peak mode shows level peaks accurately.
Return Rate pop-up menu: Choose how quickly analyzed signals return from peak/
maximum levels to zero or incoming signal levels. This is expressed in dB per second.
Peak pop-up menu: Choose the hold time for the Level Meter. Choose 2, 4, or 6
seconds—or infinite.
Note: The Hold button must be turned on for the selected time value to have an effect.