Off and on for 50 years, Swedish group Träden (formerly Träd, Gräs Och Stenar—Tree, Grass and Stones in English) have been making trance rock of solemn yet ecstatic majesty. Their marathon workouts may seem easy to create, but it's difficult to generate the precise textures and conceive the choicest chord progressions that trigger the deepest feelings of transcendence. The line between sublimity and monotony is slim, and most bands topple into the latter when working in this mode. Träden nail it, time after time. by Dave Segal