
36 CHAPTER 3. FIR DIGITAL FILTERS
file awgn.wav), which theoretically contains all frequencies. If the DSK signal output is
then connected to a spectrum analyzer, you could observe which band of frequencies is
affected, and how much it is affected, as you adjust the slider controls. If you don’t have a
spectrum analyzer available, a second DSK running winDSK can be used in its place (select
the “Oscilloscope” button from the main screen, select “Spectrum Analyzer” from the next
screen, and select “Log10” to display the result in decibels). Alternatively, you can use your
computer’s sound card to gather a portion of the DSK’s output. This can be accomplished ...