The Audio on Cue application allows you to create a play list using the audio items in your iPod/Music library on your device. Unlike playing the list in your iPod/Music application, songs are played one-at-a-time on your command - the next song in the list doesnt start until you tell it to.
I created this application because I needed a better way to control the music played from my devices during live events (recitals, talent shows, theatrical events). I tried adding "silent songs" in between songs, but sometimes I still forgot or needed to attend to other things and failed to stop the player in time. This application improved the quality of the sound in my live events: no more "oops the sound guy screwed up" mistakes.
Because of the specialized nature of this application, it does not play well with others on your iOS device. If you exit the application while playing a song, the song will quit playing. When the application is not active, it may not be in control of the sound being played. Therefore, it gives up control - by design.
Also, I dont recommend that it be used on iPhones in professional type events - you never know when you are going to get a call that interrupts your sound.