If you're referring to the 1979 Herzog version, the soundtrack is Popol Vuh.
Don't know if its in print, I have a French CD from '89 on Spalax.
There was a '98 release as a suggested score to the 1922 silent original
which I have not heard.
see the b+w original if you can, Herzogs' is great, b+w is great too
Peter
np: Thomas Koner- Daikan