Specifications

Chapter 6: DigiRack Real-Time TDM and RTAS Plug-ins 81
Multichannel Mod Delay II
The Tempo and Meter controls are linked on
multichannel versions of Mod Delay II. Each
channel has its own Duration and Groove con-
trols, but the Tempo and Meter controls are glo-
bal.
Signal Generator
The Signal Generator plug-in produces audio
test tones in a variety of frequencies, waveforms,
and amplitudes. It is particularly useful for gen-
erating reference signals with which to calibrate
Pro Tools|HD interfaces (such as the 96 I/O or
192 I/O) and other elements of your studio.
Signal Generator Controls
Frequency Sets the frequency of the signal in
hertz. Values range from a low of 20 Hz to a high
of 20 kHz in a 44.1 kHz session. The upper limit
of the frequency range for this setting will in-
crease to match the Nyquist frequency (half the
sample rate) in 96 kHz and 192 kHz sessions
(HD-series systems only).
Level Sets the amplitude of the signal in deci-
bels. Values range from a low of –95 dB to a high
of 0.0 dB.
Signal These buttons select the waveform.
Choices are sine, square, sawtooth, triangle,
white noise, and pink noise.
Peak Generates signal at the maximum possible
level without clipping.
RMS Generates signal at levels consistent with
the RMS (Root-Mean-Square) value, or the effec-
tive average level of the signal.
SignalTools
DigiRack SignalTools metering plug-ins provide
two metering modules: SurroundScope and
PhaseScope.
The SignalTools plug-ins support TDM and
RTAS plug-in formats at all sample rates.
Tempo, Meter, Duration, and Groove controls for a
stereo instance of Mod Delay II
Refer to the Pro Tools|HD Getting Started
Guide for instructions on using Signal Gen-
erator to calibrate the 96 I/O, or 192 I/O
audio interfaces, as well as older audio in-
terfaces.
Signal Generator plug-in
The TDM Signal Generator produces a tone
as soon as it is inserted on a track. To mute
the Signal Generator, use the Bypass button.
When using the RTAS version of Signal
Generator, start playback to generate.
The Signal Generator plug-in is not in-
tended for rigorous test purposes; it is a sim-
ple level calibration tool.