Some songs from the Octavarium album have negative times, which is an additional amount of time they keep playing until they have finished.
In any CD player, these songs stop at the exact time specified in the back cover, however, after doing this, the track will switch to the following and the current track will not start playing until the actual hidden time of the track has finished playing.
In a multimedia player, however, these tracks will be listed with their full time.
The ones that have negative ones are the songs whose names are placed on the white piano keys beside black keys in the back cover of the album.
The songs are the following: