“(I)n a strange booklet of sheet music that was mailed out last week to more than 1,000 people by the Daniel Reich Gallery in Chelsea,” Dionne Warwick and Philip K. Dick “take the stage together in a kind of forced virtual duet, somewhere in the ether between a real and an imagined past,” with the sci-fi writer’s words set to a Warwick hit. The gallery called artist Sean Dack’s project “a ‘non event’ or a mail exhibition.”