All the Tyrian music is now under the CC-BY-SA, because I realised it made absolutely no sense for it not to be. I've updated the "legal story" and music pages with this information.

As with what happened with Stablehand, I can't prevent you from using the CC-BY-NC-SA instead if you made a remix (etc.) before today (January 11, 2014), but from now on, this is the licence. If the licence for Tyrian as a whole turns out to be something better later, I may switch to that, but remember, "better" to me means more open, not more restrictive. And I'm guessing it will be at least a year before that happens anyway. Maybe two if I'm slow. :p

Anyway, enjoy your now-actually-libre tracks, I guess!