IT'S BACH to a cop beat of a different kind for Knox police, who have found a novel way of stopping large groups of young people hanging out at a bus terminal at Knox shopping centre intimidating commuters - by playing classical music.

Knox police officer Sgt Darrell Powell said commuters were increasingly becoming intimidated by their swearing and unruly behaviour.

But teens dislike listening to Beethoven and Bach so much they will disperse from the terminal, police hope.

And the classical tones have struck just the right note for commuters, who are enjoying Chopin in peace thanks to the joint effort between police and the Wantirna South Westfield.

But in case Mozart doesn't do the trick, Sgt Powell said security guards and police still regularly patrolled the area.

"Large groups of children can be intimidating for people who just want to shop and catch the bus," he said. "They bring their schoolyard issues and carry on with offensive language, and their antisocial behaviour impacts on others."

The idea was first trialled against unruly youths and their antisocial behaviour at Lilydale train station.