You can test the implemented filters using the tone
generator and spectrum analyzer on the PC.
-
Connect the soundcard tone generator to the codec
microphone jack to input 5kHz sine wave. Connect the
oscilloscope to observe both the codec input and
output. As you change the frequency of the sine wave,
observe how the amplitude of the filter output
changes.
-
Input white noise from PC sound card to the codec input
and observe the spectrum of the filter output using the
spectrum analyzer program. Can you see the filter
frequency response?