Digital Audio Corporation PCAP II, User Manual

Page: 33 / 164

21
This is the Lowpass Filter Control Window. It is used to
select Cutoff Frequency, Stopband Attenuation, and
Transition Slope.
27.
Use the mouse to set all controls to match the settings
shown in Figure 3-10. Do not click on the
OK button at this
time.
28.
Listen to the filter OUTPUT through your headphones. Note
the effect on the signal as the
Filter button is toggled
between Filter In and Filter Out . You should notice a
dramatic reduction in high-frequency sound whenever the
button indicates
Filter In . Try adjusting the Cutoff Frequency
control to various settings; as the Cutoff Frequency is
increased, you should hear high-frequency sounds increase,
and as Cutoff Frequency is reduced, high-frequency sounds
will be reduced.
29.
Click on OK to exit the Lowpass Filter Control Window.
30.
Click on the Filter button in the Filter 2 block until it
indicates Filter Out .
31.
Click on the Equalizer button in the Equalizer block until it
indicates Equalizer In .
32.
Click on the Select button in the Equalizer block. The
window in Figure 3-11 will appear.
Figure 3-10 Tutorial Lowpass Filter Control Window