Substrata is the third studio album by Norwegian electronic musician Geir Jenssen under the stage name Biosphere, released in 1997 by All Saints Records.

It is Biosphere's first truly ambient album, and has a theme of cold, of mountains and glaciers, and of running water.

Sounds of howling wind and creaking wood, although infrequently employed, create a chilling soundscape interrupted by sonorous but quietly suspenseful music.

In 2001, the album was re-released in a digitally remastered format with a second disc featuring a soundtrack for Dziga Vertov's 1929 film Man with a Movie Camera, as Substrata 2.

[5][6][7] In 2016, Pitchfork ranked it at number 38 on its list of the 50 Best Ambient Albums of All Time.

In my vision, I was on the veranda of a vast estate, a palazzo of some fantastic proportion.

There'd been added a number of additional rooms, but in a way that blended so seamlessly with the original construction, one would never detect any difference.

He was happy and carefree, clearly living a life of deep harmony and joy.

My vision ended, and I awoke with a tremendous feeling of optimism and confidence in you and your future.