Pre and/or post track add ons

The ability to attach an audio file before or after a specific track so that each time the track plays the pre and/or post audio file plays to.

For example: you want to record a dj introduction to a song or provide some interesting fact about the artist of a song right after the song plays.

Currently it is very difficult to do this unless using a live DJ. If there were an option to attach a pre or post file to a track it would make it easier for those who don’t use a live DJ but would like to provide info and facts about a specific track/artist.