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DigiRack Plug-ins Guide 54
2–4 Band EQ
The 2–4 Band EQ uses the same plug-in window
as the 7 Band EQ, but on the 2–4 Band EQ, but a
limited number of the seven available bands can
be active at the same time.
In the factory default setting, the High-Pass/Low
Notch, Low-Pass/High Notch and Mid Peak
bands are out of circuit, the Low Shelf and High
Shelf bands are selected and in circuit, and the
Low-Mid Peak and High-Mid Peak bands are in
circuit.
Changing from 2–4 Band to 7 Band
After switching from a 2–4 band EQ to a 7 Band
EQ, or importing settings from a 2–4 Band EQ,
all control settings from the 2–4 Band EQ are
preserved, and the bands in the 7 Band EQ in-
herit their enabled or bypassed state from the
2–4 Band plug-in.
Additional EQ bands can then be enabled to add
them to the settings inherited from the
2–4 Band plug-in.
Filter Usage with 2–4 Band EQs
With a 2–4 Band EQ, a maximum of four filters
may be active simultaneously, with each of the
five Peak bands (Low Shelf/Peak, Low-Mid Peak,
Mid-Peak, High-Mid Peak and High Shelf/Peak)
counting as one filter. Each of the Band-pass
and Notch filters (High-Pass, Low Notch, Low-
Pass and High-Notch) counts as
two filters.
When any combination of these filter types uses
the four-filter maximum on the 2–4 Band EQ,
the remaining bands become unavailable. This
is indicated by the Band Enable buttons turning
light gray. When filters become available again,
the Band Enable button on inactive bands turns
dark gray.
Switching Between the 2–4 Band EQ
and 7 Band EQ
When you switch an existing EQ III plug-in be-
tween the 2–4 Band and 7 Band versions, or
when you import settings between versions, the
change is subject to the following conditions:
Changing from 7 Band to 2–4 Band
After switching from a 7 band EQ to a 2–4 Band
EQ, or importing settings from a 7 Band EQ, all
control settings from the 7 Band EQ are pre-
served in the 2–4 Band EQ, but
all bands are
placed in a bypassed state.
Bands can then be enabled manually, up to the
2–4 Band EQ four-filter limit.
For Pro Tools HD, using a 2–4 Band EQ in-
stead of a 7 Band EQ saves DSP resources.