MOTU 896mk3, Руководство пользователя

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C U E M I X C O N S O L E
91
Shelf filters
Figure 11-17: Shelf filter Q parameter overshoot.
When two top-most bands in the EQ tab are set to
their
shelf filter setting (Figure 11-10), the Q
parameter controls the amount of overshoot
applied to the response curve, as illustrated in
Figure 11-17. When Q = 0.01 (the lowest setting),
normal shelving is applied with no overshoot. This
produces the response provided by a first order
shelf. When Q = 1.0 (the default setting), the
response corresponds to a second order shelf, still
with no overshoot. This is the same response as
conventional parametric EQs. In some situations,
this form of accurate, clean shelving can sound
harsh, especially when compared to legacy analog
EQs. To soften the results, the overshoot is
increased as Q is increased, as shown Figure 11-17
for Q values of 1.00, 2.00 and 3.00. This overshoot
region produces a boost in frequencies just above
the cutoff, which compensates in a smooth, more
pleasing fashion for the perceived drop in low
frequencies being cut.
Conversely, when shelving boost is being applied,
overshoot cuts frequencies just above the cutoff to
again compensate in a smooth and pleasing fashion
for the perceived boost in low frequencies:
Figure 11-18: Overshoot when low shelf boost is applied.
Overshoot is also applied to high shelf boost and
cut:
Figure 11-19: Overshoot when high shelf cut and boost is applied.