Ah this is from the Lateralus album; the album (and song by the same name) closely incorporates the Fibonacci sequence. The song's main theme features successive time signatures 9/8, 8/8, and 7/8. The number 987 is the sixteenth integer of the Fibonacci sequence. If you write the song numbers from 1-13 and start a spiral from the centre (6)moving out to 9, and another moving in from 13 then arrange the songs in that order and play them in succession the album changes entirely (preferably with silences between the songs removed - sobriety optional) and flows like one long track. (Track listing: 6,7,5,8,4,9,13,1,12,2,11,3,10)
Whoops, was meant to add this:
But wait there's more, if you add each coinciding side of the spiral they add to 13 eg:
6,7,5,8,4,9,13,1,12,2,11,3,10
6 + 7 = 13
5 + 8 = 13
4 + 9 = 13
13
1 + 12 = 13
2 + 11 = 13
3 + 10 = 13
Manyard also follows something similar for the syllables used in the lyrics for Lataralus:
black [1]
then [1]
white are [2]
all I see [3]
in my infancy [5]
red and yellow then came to be [8]
reaching out to me [5]
lets me see [3]
there is [2]
so [1]
much [1]
more and [2]
beckons me [3]
to look through to these [5]
infinite possibilities [8]
On the last Tool album (10 000 days) they do something similar, however this time around a proper mind effing ensues. Three of the tracks (10,000 days, Wings for Marie and Viginti Tres) are meant to be played in unison; this creates a completely new track with different lyrics. By themselves, the songs seem completely different: "10,000 Days" (11:13) is a long prog-rock number, "Wings for Marie" (6:11) is a quiet song that builds up into a crescendo and "Viginti Tres" (5:02) is just a bunch of weird noises. 6:11 plus 5:02 adds up to 11:13 -- that's because you're supposed to put "Viginti Tres" and "Wings for Marie" together (in that order) and play them at the same time as "10,000 Days."
Here is an already mixed version of it:
Have a nice day! ?