If you wanna wait for when the album comes out, DO NOT click on the link. This is just a short sample (2:33) of Windowpane. Keep in mind that the quality is not that great.
http://onlinerock.com/musicians/chaotictribe//opeth_-_windowpane.mp3
http://onlinerock.com/musicians/chaotictribe//opeth_-_windowpane.mp3