miniDSP Ltd, Hong Kong /
/ Features and specifications subject to change without prior notice
25
EQ band selection
Click on the radio buttons
EQ1
,
EQ2
, etc. to display the parameters for that filter.
Basic/Advanced
By default, each filter is in basic mode, and shows the controls described below. Advanced mode
enables custom biquad programming for almost infinite flexibility in filter implementation. This
is described in
on page 27.
Filter type
Selects the type of filter:
PEAK
Create a dip or a peak in the frequency response.
LOW_SHELF
Reduce or increase part of the frequency spectrum
below
a given frequency.
HIGH_SHELF
Reduce or increase part of the frequency spectrum
above
a given frequency.
SUB_EQ
Create a dip or a peak in the frequency response at low frequencies (10 to 50
Hz). This filter type is similar to PEAK but gives more accurate results for low
frequencies. Note that activating any SUB_EQ filter reduces the number of
available filters on that channel from six to five.
Frequency
For the PEAK and SUB_EQ filter types, this is the center frequency of the peak or dip. For the
HIGH_SHELF and LOW_SHELF filter types, this is the frequency at which the gain is half of the set
value.
Gain
For the PEAK and SUB_EQ filter types, this is the gain in dB at the center frequency. For the
HIGH_SHELF and LOW_SHELF filter types, this is the gain in dB reached at high or low
frequencies respectively. A filter has no effect if its gain is set to 0 dB. Gain can be adjusted in
increments of 0.1 dB up to +/- 16 dB.
Q
Q controls the “sharpness” of the filter. For the PEAK and SUB_EQ filter types, lower Q gives a
broader peak or dip, while higher Q gives a narrower peak or dip. For the HIGH_SHELF and
LOW_SHELF filter types, Q controls how quickly the filter transitions from no gain to maximum
gain.
Bypass
The
Bypass
button enables or disables a filter. The filter is
bypassed if the button is greyed out, as shown at right.
(Note that all other filters are still operational unless
individually bypassed.) A filter will also have no effect if its gain is set to 0.0.