It was a hell of a thing to see Dweezil Zappa onstage at the Wiltern last night, jamming with his pop, who of course passed away fourteen years ago. You can thank modern technology. Frank was projected on a large screen behind the actual living musicians, who played along to his vocal and guitar tracks. Of course we’ve seen this kind of thing before, Natalie Cole’s sentimental duet with her father being the first......