Top violinist taking classical music behind bars and to the streets

Inspirational LA Phil violinist Vijay Gupta co-founded blah blah blah in the article 

About 150 audience members are listening rapt as Vijay Gupta, acclaimed violinist for the Los Angeles Philharmonic, and his colleague Zach Dellinger play a movement by Mozart for the violin and viola. Some of those watching nod their heads or tap their feet, others close their eyes, the better to appreciate the sprightly interplay of the two instruments.