Jazz great Wynton Marsalis was in West Philly yesterday to do some teaching at St. Francis de Sales school near 47th and Springfield as part of the Play On!, Philly program.

Marsalis told advanced trumpet players who performed at the school yesterday morning that the musician’s job is to tell stories that people can’t see.

“Music is the art of the invisible,” he said.

Marsalis also advised students at the school to fine-tune their listening habits and to look beyond music for artistic inspiration.

“I want you to look at the work of (painter) Henri Matisse,” he told one trumpeter who had just finished playing. “See how he uses contrast in his work. Because that’s what you want to do with this piece.”

This has been a big week for Play On!, Philly, the after-school music program begun at St. Francis de Sales that aims to bring classical music training to kids at schools across the city. Earlier this week it was reported that a Bala Cynwyd couple had donated $1 million to the organization.