This is only meant for a talk page, but might be useful elsewhere. It's three 5 second chunks of 100 Hz sine wave, with various distortion. They have each been enveloped with a smooth ADSR curve, to sound kind of "musical".

Before the envelopes were applied:

1. The first, from 0 to 5 seconds, is just a 100 Hz sine wave
   • -6 dBFS RMS
   • After notch filtering the fundamental, signal is at -90.3 dBFS = 84.3 dB THD+N = 0.006% THD+N
2. The second, from 5 to 10 seconds, is a 100 Hz sine wave with additional harmonics at 200, 400, 600, and 800 Hz
   • -6 dBFS RMS
   • After notch filtering the fundamental, signal is at -16.9 dBFS = 10.9 dB THD+N = 28.5% THD+N
3. The third, from 10 to 15 seconds, is a 100 Hz sine wave with additional harmonics at 300, 500, 700, and 900 Hz
   • -6 dBFS RMS
   • After notch filtering the fundamental, signal is at -17.8 dBFS = 11.8 dB THD+N = 25.7% THD+N

The envelope changed the levels, of course, but the distortion amount should be the same. The ogg formatting also changed the characteristics, but the distortion is exaggerated and still audible.

Source: Created by User:Omegatron using Adobe Audition

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