Frequency Response Determination Using a Sound Card

   It is possible to determine the frequency response for many simple circuits using nothing more than a sound card and Labview.  This lab illustrates a practical example of this.

    Ultimately all a sound card can do is sample a signal at a set frequency and play a different signal back.  To simplify out analysis we shall set both the recording and the playback frequency at 44.1kHz and base our analysis on this.