The setup consists of a guilar, microphone and a computer that displays the sound from the microscope. On the right monitor is the microphone data. On the left data is a java applet.

A tuning fork for "F" 330 Hz is used to compare with the first string of the guitar tuned to the same note.

The tuning fork has the same frequency of the guitar but the waveforms are different.

The left monitor is displaying a java applet. The right monitor is comparing the tuning fork and the guitar.