What is the exact digital format of KKBOx's offline songs?

There are two music services in Taiwan that are really great. One is KKBOX, the other is EZPEER. I was able to play my songs in other applications because they both used WMA, now KKBOX migrated to their own system and can only play in their own app. Is it really different from wma? Anyway to make it play with other players on my computer… ?