Reposted in its entirety, this item from the seattle livejournal community was too mysterious not to pass along:

f[t] = Sin[t+t Sin[5t^1.2]]
this friday the streets of pike and pine will be split by the sonic forces of mathematics. mathematicattack will appear on pike and pine from 11:45pm to 12:30am and on the corner of pine and summit from 11:47pm to 11:56 pm. what you will hear is the sound of mathematical functions. [lj]

Maybe it’s the sonic analog to the visual arts project described in this month’s Wired (”Sine Language” [12.09]) or maybe it’s the sound of high school precalc students mourning the return to regular mathematics. In the event that it’s not a hoax, you’ll know what’s interrupting your regularly-scheduled Friday night adventures in the Pike-Pine corridor.
special added value feature: the metblogs maths team provides this graph of the mysterious function for your enjoyment.