DigiDesign DigiRack Plug-ins Manual page 92

Auto Reset When enabled, causes the start time
of the Leq(A) measurement window to be auto-
matically reset whenever playback starts in
Pro Tools.
Hold on Stop When enabled, causes the Leq(A)
measurement window timer to pause when
playback stops, and resume when playback be-
gins again.
In any of the Loop Transport modes, the
measurement start time is automatically re-
set each time playback goes back to the be-
ginning of the loop.
SignalTools Level Meters
The SignalTools plug-ins let you choose the type
of metering to use. Each meter type has a differ-
ent metering scale and response.
Peak Hold
selector
Reference
mark
SignalTools level meters
86 DigiRack Plug-ins Guide
Meter Types
Peak (Default meter type) Uses the metering
scale in DigiRack EQ III and Dynamics III plug-
ins.
RMS (Root Mean Square) was used in previous
versions of the Digidesign SurroundScope plug-
in and uses the same "true" RMS metering scale.
Peak + RMS Uses a multi-color display to show
both types of metering. Peak metering is shown
in conventional green color, while RMS meter-
ing is shown in blue.
VU (Volume Unit) Uses AES standards for signal
Meter Type
level indication.
selector
BBC Uses IEC-IIa standards for signal level indi-
cation. This style of metering suppresses short
duration peaks that would not affect broadcast
program material. Reference calibration (4 dB) is
–18 dBFS.
Nordic Uses IEC Type I standards for signal level
indication and provides greater resolution for
readings between –10 dBu and +4 dBu. Refer-
ence calibration (0 dB) is –18 dBFS.
DIN Uses IEC Type I standards for signal level in-
dication and provides greater resolution for
readings between –10 dBu and +5 dBu. Refer-
ence calibration (–9 dB) is –18 dBFS.
The "true" RMS meter scale is not the same
as the AES 17 RMS scale. For a sine wave
with a peak value of –20 dBFS, the "true"
RMS meter will show a value of –23 dBFS.
(The same sine wave will show a value of
–20 dBFS on an AES 17 RMS meter.‚