The obsession that some Game of Thrones fans have with Ramin Djawadi’s music took even the composer by surprise. (The numbers associated with the various YouTube versions of the theme — from serious ones on violin or cello to wacky ones for cat, floppy disc, wine glasses and more — are simply astounding.) Now, however, fans of the HBO series who must wait another year for new episodes can get their fix with a live concert version that will tour North America in early 2017. I attended the press conference at which Live Nation announced the plans, and composer Djawadi talked about the phenomenon.