If we include live performances, my longest single track is:
Underworld - 08/08/2010 Essential Mix (4 hours 57 min 56 sec)
If we're only talking about songs, my longest is:
KLF - Chill Out (44:19)
If we include live performances, my longest single track is:
Underworld - 08/08/2010 Essential Mix (4 hours 57 min 56 sec)
If we're only talking about songs, my longest is:
KLF - Chill Out (44:19)