Substrata is an ambient music album by Biosphere, released in 1997 by All Saints Records. It is considered to be a classic ambient album, consistently in the top 5 in surveys on the Hyperreal ambient mailing list.
Biosphere's first truly ambient album, it has a theme of cold, of mountains and glaciers and running water. Sounds of howling wind and creaking wood, although infrequently employed, create a chilling soundscape interrupted by sonorous but quietly suspenseful music.
1. "As The Sun Kissed The Horizon" – 1:47
2. "Poa Alpina" – 4:10
3. "Chukhung" – 7:34
4. "The Things I Tell You" – 6:28
5. "Times When I Know You'll Be Sad" – 3:44
6. "Hyperborea" – 5:45
7. "Kobresia" – 7:12
8. "Antennaria" – 5:05
9. "Uva-Ursi" – 3:00
10. "Sphere Of No-Form" – 5:47
11. "Silene" – 7:54