Metric Halo SpectraFoo - Manual (Page 18)

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3. Instruments
SpectraFoo Standard
SpectraFoo Standard includes the following set of real time metering instruments:
• Level Meters: high resolution, standards-based level metering with the ability to display Peak, RMS and
VU levels simultaneously. Supports European and AES PPM standards and K-System metering. Highly
user configurable.
• Spectragraph: ultra high resolution real-time two channel spectrum analyzer with snapshots, cursors
and overlays. Supports a variety of scaling, spectral weighting and ballistics.
• Spectragram: history display to accompany Spectragraph. Like a topological map of your signal; beau-
tiful & informative!
• Timecode clock: running display of current timecode source.
• Oscilloscope: configurable, triggerable, dual channel audio frequency oscilloscope. Provides high-res-
olution wave form display and simple waveform math. Versatile triggering modes make this ideal for
a variety of measurements.
• Power History: shows a running history of the peak and RMS level of the metered signal.
• Envelope History: shows running “envelope” of the metered signal, similar to a DAW overview.
• Band Power History: shows the running history of the total power within a specified bandwidth around
a specified center frequency.
• Phase Torch™: Metric Halo’s unique two-channel phase visualization tool, displaying phase as a func-
tion of frequency, independent of power.
• Lissajous Phase Meter: familiar X-Y mode O-scope two channel phase meter – with a twist; supports X-
Y mode, Lissajous mode, and Stereo position mode. Also supports auto gain control to provide useful
readings during fades or other very low-level material.
• Power Balance: unique meter that shows the history of the relative power between two channels. Perfect
for balancing mics or for monitoring the relative stereo soundfield balance.
• Correlation: A favorite in European broadcast circles; shows an instantaneous representation of how
mono-compatible the monitored stereo signal is.
• Correlation History: a companion to the Correlation meter, the Correlation History meter shows how
the correlation is changing over time. Dockable with the Correlation meter.
SpectraFoo Complete
SpectraFoo Complete adds the following instruments to the Standard set:
• Code Meter: Shows the per-bit activity of the digital audio signal routed to the meter; commonly known
as a “Bit-Scope”.
• Code Matrix Meter: A unique meter designed to examine the upper 16 bits of a digital signal. Allows
you to quickly discover missing codes, converter problems and code-space utilization.
• Code List Meter: A 1630-style display that shows the sequence of code values in the digital signal routed
to the meter.
• Transfer Function: Two channel differential FFT analyzer. This instrument allows you to compare the
spectral and phase content of two signals. If the two signals are related (part of a system), the Transfer
Function allows you to quickly discern the effect that the system has on the signals. Coupled with the
delay finder (see below), this is the critical tool for measuring the acoustic response of speakers and
rooms. It is also the primary tool for measuring the electrical response of signal processors. You can also
use the transfer function to analyze the difference between snapshots captured with the Spectragraph
instrument.