The Fusion Advanced Room Correction System: How It Works - Emotiva Fusion 8100 User Manual

Fusion 8100: User Manual
Note: Moving the selector bar to an EQ choice that isn't highlighted and pressing Enter selects
that choice. At this point (if you have an active input which is subject to EQ) you will be able to
preview what that choice sounds like. Moving the selector bar to an EQ choice that is already
highlighted, and pressing Enter, takes you into a sub-menu where you can make detailed
adjustments to the selected EQ configuration. (If you get into this screen by mistake, and want
to get out without changing anything, you can do so by pressing Enter or Return.)
Note: If you have Direct Mode selected, or are using the 7.1 Channel Audio direct input, you
will NOT be able to preview the EQ settings (because EQ is not applied in Direct mode). It is
therefore a good idea to make sure that you are listening to an input and mode in which EQ is
applied if you want to preview your settings. (If you haven't done any advanced configuration,
HDMI 1 or HDMI 2 will probably work well for this.)
Note: If you run the Fusion Advanced Room Correction System multiple times, you will get
similar results (but probably not identical). You will not get more accurate results by running
it repeatedly (it does not save or average results from multiple runs). If you aren't entirely
satisfied with the results, try moving the microphone to a slightly different position, or simply
adjust the results manually to fit your tastes.
The Fusion Advanced Room Correction System™: How it works.
For the technically inclined, here is a brief explanation of how the Fusion Advanced Room
Correction System works:
The first set of tones you hear (the ones that get progressively louder) are used to set an
appropriate level at which to run the test.
The next set of tones are used to determine the individual level, phase, and distance of each
speaker. This is done three times, and the results averaged, to minimize errors.
The results are then displayed.
The next set of tones are used to determine the optimum EQ settings. First, a loud set of tones
is run, and the highest response peaks are reduced. The subsequent tests, which may be run
anywhere from two to five times depending on how much adjustment of the initial rough curve
is necessary, are basically repeats of the initial run. For each run, the result is averaged and
compared to the reference (flat) curve, and each time this is done, the response peaks are again
reduced, bringing the final result closer to the reference curve each time. Once the curve is as
close as possible to the reference curve, then the final offset and level calibration measurements
are performed.
The final sequence starts off with a loud burst of unequalized test signal, followed by a quieter
burst of the test signal with the calculated EQ applied. The third burst consists of the difference
between these two signals, and is used to detect any unaddressed room modes (nulls), which are
then the subject of further adjustments. The final loud burst is the equalized and adjusted test
signal, and is used to set the final, precisely calibrated, level trims for each channel.
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