The original ballet is only about 85 minutes long if performed without applause or an intermission, and therefore much shorter than either "Swan Lake" or "The Sleeping Beauty", but some modern staged performances have omitted or re-ordered some of the music or inserted selections from elsewhere, thus adding to the confusion over the suites. In most of the very famous versions of the ballet, the order of the dances has been slightly re-arranged, and/or the music has been altered. For instance, the 1954 George Balanchine New York City Ballet version adds to Tchaikovsky's score an that the composer wrote for Act II of "The Sleeping Beauty" but which is now seldom played in productions of that ballet. It is used as a transition between the departure of the guests and the battle with the mice. Nearly all of the CD and LP recordings of the complete ballet present Tchaikovsky's score exactly as he originally conceived it.