Gapless (Tracks Menu)
Use this command to force zero length gaps between tracks. When gapless mode is in operation, you cannot insert fades or silent sections at the boundaries. There is an exception to this rule at the start of the first track and at the end of the last tracks. For these special boundaries you can insert fades and silences even in gapless mode.
Use gapless mode when you require a seamless transition between tracks. See Gapless Tracks for more information about this subject.