10.6

172Logic Pro Effects
Logic Pro Surround MultiMeter Peak parameters
Surround MultiMeter offers common Peak parameters for the Analyzer, Goniometer, and
Correlation/Balance metering tools. The Level Meter has discrete Peak parameters. See
Logic Pro Surround MultiMeter Loudness and Level Meters.
Peak parameters
• Hold Time pop-up menu: Choose the hold time for all metering tools. Choose 2, 4, or 6
seconds—or infinite.
Note: The (peak) Hold button must be turned on for the selected time value to have
an effect.
• Hold button: Turn on to use for all metering tools in Surround MultiMeter. This is
displayed as follows:
• Analyzer: A small yellow segment above each level bar indicates the most recent
peak level.
• Goniometer: All illuminated pixels are held during a peak hold.
• Balance/Correlation Meter: The horizontal area around the white correlation
indicator denotes phase correlation deviations in real time, in both directions.
• Reset button: Reset the peak hold segments of all metering tools.
Logic Pro Surround MultiMeter Loudness and Level Meters
The Loudness Meter to the left of the Level Meter shows the momentary loudness level.
Loudness indicates the perceived level of a signal which is indicative of human hearing,
making it a useful reference tool when mixing or mastering. The 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. Surround MultiMeter provides two indicators above the
Loudness Meter. You can freely drag the target level indicator.
• 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.
The 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 draggable 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.