User`s manual

unlit). You should notice a reduction in background noise whenever the filter is in. Press the

Clear button to cause Filter 1 to readapt to the input signal.

25. Restore the Filter Active button to the out state (LED unlit) and click on OK to exit the 1-

Channel Adaptive Filter Control Window.

26. Click on the Control button in the Filter 2 block. The window in Figure 3-9 will appear:

Figure 3-9 Tutorial Lowpass Filter Control Window

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 3-9. 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 Active button is toggled in and out. You should notice a dramatic reduction in high-

frequency sound whenever the button indicates that the filter is 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 Active button in the Filter 2 block of the Master Control Panel until it indicates

that the filter is out.

31. Click on the Active button in the Equalizer Block until it indicates that the Equalizer is in.

32. Click on the Equalizer selection box in the Equalizer Block. The window in Figure 3-10 will

appear.