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D*AP4
Setup GUI – AUDIO PROCESSOR – Filter – Spectral Signature
Spectral Signature is a highly sophisticated dynamic multiband filter to boost (or reduce) spectral parts
of the processed audio signal dynamically. It punches through a reference spectrum to the processed
audio signal.
Program / Section
Channel
Enable
Graph (upper)
Input / Output Spectrum
Absolute Gate Threshold The spectrum is shown in absolute values (related to digital full scale).
Normalized Gain
[Program1 / Program2 / Preset]
Selects the program for which Spectral Signature will be displayed.
Since this view does not allow the display of a preset page side by side
as usual one must select "Preset" to get to the preset editor.
[1L/1R, 2L/2R, 1L, 1R, 2L, 2R]
Depending on the program selected and the link status (see below
lower graph) the channel under control will be displayed here.
[ON / OFF]
Enables / disables Spectral Signature for the selected program.
Please note: For convenient operation, this function is also available
(in the Expert section, see below) within the web interface.
The upper graph is a metering window, illustrating the difference
between the input (dotted line) and the output (solid line) signal.
This window can be used in two different ways:
[alternative selection]
This is very helpful to get an impression of the frequency response of
the signal. Also, in this mode the absolute gate threshold can be set
within the graph by grabbing and dragging the lower transparent white
area. The gate LED row at the bottom indicates whether the absolute or
relative gate of the band is closed (yellow) or open (green). A gray LED
indicates that the band is switched out.
[alternative selection]
This is very useful to see the actual amount of amplification or
attenuation within each band. In this setting the Absolute Gate
Threshold cannot be set.
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