Danley DNA SC48, Руководство пользователя

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Gain and Polarity
The gain page of the input channel selected allows users to increase or decrease the amount of
signal going into the selected input.
Using encoder “
A
” will chan
ge the value in 0.2dB steps from
-40dB to +20dB
. The presence of an active Group Overlay parameter is indicated by the ‘[]’ symbol
(See Overlays ). This page will also allow users to change the polarity of the selected input from
normal to reverse, using encoder “
B
”. Using encoder “
C
” will mute the selected channel.
Delay
The delay page which controls the amount of delay associated with the input channel selected and is
adjustable from 0 to 998ms. The delay parameter is adjustable in fine steps at low values. The
adjustment becomes progressively coarser as the value increases. The presence of an active Group
Overla
y parameter is indicated by the ‘[]’ symbol
. See
Overlays
.
High Pass Filter
System high pass filtering is provided for the input signal. Filter type is selectable from 1
st
order,
Butterworth, Bessel, Linkwitz-Riley and Hardman. Filter slopes of up to 4th order or 24dB / octave
are provided. Not all filter types are available in all slopes. For example, 18dB / octave Linkwitz-Riley
filters do not exist.
The Hardman type filter is always described by its order as the filter becomes progressively steeper
rather than following a linear slope so a dB/octave description is not accurate.
Parametric Equalization
There are nine stages of Equalization available for each input channel. This consists of three shelving
filters and six parametric filters.
FIR Shelving EQ
The Input High Shelf EQ is implemented using a Finite Impulse Response (FIR) filter, and exhibits a
linear phase response; that is all frequencies are delayed by the same amount. This can be important
in applications where different amounts of EQ are applied to different parts of a loudspeaker cluster,
such as to add 'Throw' EQ boost so that parts of cluster which are throwing further can have HF
absorption correction added. If this EQ is not linear phase, then the zones where the loudspeakers
combine may suffer frequency response anomalies.
Being a linear phase FIR equalizer, this necessarily introduces some latency delay, which is constant
regardless of the settings. However, when the
‘
Enable
’
parameter
is set to “Off”
, it is removed from
the signal path entirely, so it does not add any latency.
Using encoder “
A
” will change the frequency
parameter from 2kHz to 20kHz, using encoder
“
B
”
will enable/disable the filter, and using encoder
“
C
” will change the cut or boost in
0.2dB increments. The presence of an active Group Overlay
parameter is indicated by the ‘[]’ symbol being appended to the Gain value
(See
Overlays
). The filter
(and its associated latency) can be completely removed by setting the enable
parameter to the “
O
ff”
position.
Note that this EQ can only be used in Module Groups if set to ‘On’.
Also see Latency Delay .
Parametric Filters
Parametric filters are defined by frequency, bandwidth and gain. The frequency is controlled by
encoder “
A
” and ranges from 10Hz to 25.6k
Hz. The bandwidth, shown as Width on the screen, is