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additional SIFs. (The PCAP II will series up to four). The audio
outside those limits is unfiltered.
Range and Gain: SIF is a spectral attenuator. The spectral peaks
are pressed down toward the spectral valleys. The amount of
reduction is limited by the
Range
scroll bar. If, however, all peaks
are reduced to the
lowest
valley, no more reduction takes place.
For example, if the distance from the highest peak to the lowest
valley
between the Upper and Lower Limits
is 30dB, the maximum
range actually used will be 30dB, even if the scroll bar is set to a
larger
Range
. Normally a
Range
of 10-20dB is adequate, as
attacking the stronger spectral peaks will provide the necessary
enhancement. Go gently at first and compare several SIFs with
different
Ranges
. The Store and Recall memories are useful in
saving candidate filter solutions.
Since the SIF is an attenuator, the audio level should be restored with
the
Gain
scroll bar. Normally, setting this to one-half the
Range
is
adequate. If output distortion occurs, reduce the
Gain
. The
Gain
may be increased to make up for losses in previous Filter stages.
Note that the Gain is usually 0 dB in the
Attack Noise
mode.
Figure 4-39
Attack Noise
operation,
Attack Range
set to
30dB
Summary of Contents for PCAP II
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Page 68: ...56 Figure 4 14 Lowpass Filter Graphical Description ...
Page 71: ...59 Figure 4 16 Highpass Filter Graphical Description ...
Page 75: ...63 Figure 4 18 Bandpass Filter Graphical Description ...
Page 90: ...78 Figure 4 28 Slot Filter Graphical Description ...
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