We have developed an online oscilloscope program which allows users to see waveforms by utilizing
their computer microphones, selecting from our library of over 30 audio files, and opening any *.mp3
or *.wav file on their computers. The oscilloscope displays real-time signals against time. The
oscilloscope has been calibrated so one can make accurate frequency measurements of periodic waves
to within 1%. The web app is ideal for computer projection in class.