Board Thread:Questions and Answers/@comment-183.171.163.221-20140215073421/@comment-1173941-20140215081429

Wouldn't that be nice to know?

I've seen this question pop-up multiple times on other sites, and I've gone back and tried to check through all the songs that are released under SAO.

My guess? You'll have to wait for the Extra Edition BD to come out (in April), which may or may not have the soundtrack for it, with the disk. (I don't know how this normally works, really)

Or you could try asking the author on Twitter. He happens to occasionally answer fan-questions, even in English (often really rediculous ones, and some just really strange) Though, he usually only answers them if they're asked while he's on.