I thought It was only me, hahaha!
I almost got crazy doing that between ep13 and ep14...
Also, In my case, the wasteland. Sure the place is cool and all, but when you have to grind to defeat aya, it can become quite annoying... and specially the music, it drove me insane at the time...
Probably it was before that wonderful tauros. I almost cried when I saw It JK