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Applications
EQing a monitor wedge
A typical application of GEQ would be to EQ a
monitor wedge. The red trace shows how both
the high and low pass filters have been used to
shape the overall response, and the use of the
two notch filters to attenuate particular problem
frequencies. Note that the faders are completely
flat, and so can be used to make incremental
changes relative to the response shown above.
In contrast, a Symmetrical-Q equaliser - even
with a high pass filter - cannot produce the same
response, either with a narrow or wide response (a and b traces). The effect of the interaction
caused by combining the individual fader responses makes it impossible to match the response
created using the GEQ's filters, and while the narrow response is more able to produce the desired
notches, it is again at the expense of ripple in the low pass filter response.
A Symmetrical-Q equaliser lacking the additional
filters cannot produce a high pass filter response
using just its faders, either with a narrow or wide
response (a and b traces). The user may
assume that subsonic frequencies are being
attenuated by cutting the bottom faders but the
graph shows that this is not the case.
XL8 Control Centre
Operator Manual
229
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