Example test signal. This 100-second audio file consists of  30 seconds of a 1 kHz sine wave, 40 seconds of a 500 Hz sine wave, and 30 seconds of a 2 kHz sine wave. Because the 500 Hz portion is the longest, the ideal summary should consist primarily of the 500 Hz signal as opposed to the shorter 1 KHz and 2 KHz segments. 

    Download:    testtones.wav    testtones.mp3

N.B.: These files contain nearly two minutes of highly uninteresting test tones, and there's no compelling reason for anyone to actually listen to them. We provide them for completeness, and for anyone who might care to reproduce our results using this data. 

Table 1: Summary times for The Magical Mystery Tour, by the Beatles

Table 2: Summary times  for Spring - Allegro, from The Four Seasons, by Antonio Vivaldi:

Table 3: Summary times for Wild Honey, by U2

For comparison, 30 second summary from Amazon.com: Wild Honey

Table 4: Summary times for Take the %u201CA%u201D Train, By Duke Ellington and his orchestra.