* Music: Bubble Factory, the film production...

* Music: Bubble Factory, the film production company founded by Sidney J. Sheinberg when he left MCA Inc. as president in July, is forming a joint venture record label with MCA Music Entertainment Group called Track Factory. The label, to be headed by former TriStar executive and concert promoter Tim Sexton, will be involved in developing soundtracks, albums tied to publishing and interactive ventures as well as albums from musical artists. The label’s first album will be the soundtrack for the upcoming film “Flipper.” The film is the first movie produced by Bubble Factory, which includes as its partners Sheinberg’s sons, Jon and Bill.