miniDSP 2X4 HD User Manual page 24

EQ band selection
Click on the tabs 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
Filter type
Selects the type of filter:
PEAK
LOW_SHELF
HIGH_SHELF
SUB_EQ
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 "lit". (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.
miniDSP Ltd, Hong Kong / www.minidsp.com
Custom biquad programming
Create a dip or a peak in the frequency response.
Reduce or increase part of the frequency spectrum below a given frequency.
Reduce or increase part of the frequency spectrum above a given frequency.
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 ten to nine.
/ Features and specifications subject to change without prior notice
on page 29.
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