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Mystery Signal of the Month   Sep 27 2000
We've got signal, but what the heck is it?
That's your mission.  Analyze this bébé.
 

mystery spectrogram                                                                                                                                                          

download the audio file 1.wav.gz

hints :

  • Setup baudline to be a Netscape helper application as described in the FAQ.
  • Ignore the 60 Hz AC power leakage and its harmonics (120 Hz, 180 Hz).
  • Turn on the 60 Hz notch filter in the play deck.
  • Try playing the mystery signal at different speeds, slow it down or drop it an octave.
  • Measure the harmonic relationships, what are the fundamentals?



What is it?

Click here for the answer.

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