Is there a music app that will play each song in a playlist for only X seconds?

[ZachG]

I am trying to DJ a partner dancing (ballroom dance) event. I would like each song in my list to play for around 2:30 and then fade and start the next song in the playlist. If there is an app that has a "preview" or "intro" function that might work. I have used a program for a windows computer that has this functionality but haven't been able to find one for android. Does anyone know of a player that has this functionality? Thanks.