A Nostalgia for New York, by Way of the Toronto Film Festival

If all goes according to plan this weekend at the TorontoInternational Film Festival, voices caught on tape at a Manhattan rapsession more than 33 years ago will introduce a film about the makingof "A Chorus Line."Those voices, and others from a handful of movies at this sprawling,10-day film festival opening on Thursday, are also likely to rousesome serious nostalgia for a New York that somehow got away.