Moderna Museet is going to be open from 7 pm February 17 through 7 pm February 19. For forty-eight hours, seven of the museum´s galleries will be occupied by the sound installation freq_out 8. The result will be a combination of sound and light that will "drench" the galleries in all the colors of the rainbow.

http://www.modernamuseet.se/en/Stockholm/Exhibitions/2012/freq_out8/