Specifications

Chapter 88: Signal Generator 489
Chapter 88: Signal Generator
Signal Generator is a test tone generator plug-in
that is available in TDM, RTAS, and AudioSuite
formats.
The Signal Generator plug-in produces audio
test tones in a variety of frequencies, wave-
forms, and amplitudes. It is particularly useful
for generating reference signals with which to
calibrate Pro Tools|HD interfaces and other ele-
ments of your studio.
Signal Generator Controls
The Signal Generator plug-in provides the fol-
lowing 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 ef-
fective average level of the signal.
Signal Generator plug-in
Refer to the guide that came with your audio
interface for instructions on using Signal
Generator to calibrate the interface.
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 Gen-
erator, 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.