MOTU 828 Mk III Hybrid User Manual page 79

Adjusting filters in the display
Each filter has a handle, displayed as shown below
in Figure 9-12 (in the filter's color), for adjusting its
boost/cut and/or frequency:
Figure 9-12: Drag the filter handle to adjust its frequency and/or
boost/cut. Drag the Filter Q handles to adjust the Q.
For the EQ filters, when you click the handle, you'll
also see lines on either side for adjusting the Q
parameter, as shown above.
☛
Shortcut: hold down the Option/Alt key while
clicking an EQ filter handle to enable or bypass that
EQ filter band.
EQ filters
The EQ filters have three parameters:
Control unit
Gain dB
Frequency Hertz
Q n/a - see note below
Q
The Q setting does not have a unit of measurement.
Rather, it is the ratio of the filter's center frequency
to the bandwidth of the filter. In addition, the
actual Q value for the EQ curve being applied is
dependent on three factors: the gain setting, the
filter style, and the Q setting.
C U E M I X F X
Filter types
Each filter can be independently set to one of four
different filter types: I, II, III and IV. These, and the
additional shelf filters for the LMF and HMF band,
are discussed in the section "EQ filter styles".
Returning to zero (or nominal frequency)
Filter handle
To return a knob to zero, or it's nominal frequency,
Filter Q
double-click it.
(red line)
EQ filter styles
EQ is one of the most widely used processing tools
and can be applied to many different situations,
from minor corrective tasks to highly creative
applications. Over the years, many EQs have been
engineered for specific applications or to achieve a
certain sound. The Vintage EQ has been designed
to be flexible enough to cover a broad range of
applications. To that end, several different filter
types are supplied, varying mostly in the way they
handle the dynamic interaction between Gain and
Q. This crucial relationship has been modeled to
emulate the smooth and musical character of
classic analog EQ circuits, in which the Gain/Q
dependency was dictated by the actual circuit
design and electrical components used.
range
The following sections describe the character of
-20.00 to +20.00
each type of EQ filter and their suggested
20 Hz to 20 kHz
applications. In the illustrations for each filter style
(Figure 9-13 through Figure 9-16), the settings for
0.01 to 3.00
the three example curves are the same for the
purpose of comparison:
Frequency = 1.00 kHz
■
Q = 1
■
Gain = +3, +10 and +20 dB
■
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