** 1/2 Michel Petrucianni, “Playground,” Blue Note. What’s come over this incisive, commanding jazz pianist? The heralded improviser investigates mostly pop-flavored vehicles, and while he

brings his distinctive sense for melody to these generally characterless tunes, they just aren’t demanding enough for his talents. _ Albums are rated on a scale of one star (poor) to five (a

classic). _ MORE TO READ