I assume by overlap you mean there is no fade out of the playing track and no fade in of the next track, correct?Yes.
So if the next track starts five seconds before the end of the playing track, wouldn't its volume cover up the lyrics of the first track?You are right, but it depends on the volume of the start of the next track. Still, I get your point. Now, the reason I was asking this is that the previous software I was using offered that possibility and I'm kind of used to this functionality. I suppose, by your answer, that Musicbee simply does not do that, which is ok.
Thank you phred for your answer.