Delerium completely changed their sound with this record. Bill Leeb and Rhys Fulber combined pure synth hooks, slow moving basslines, and great chant samples to create amazingly sensual, trancey ethereal music. Two songs have lyric vocals, Flowers Become Screens and Incantation. Flowers Become Screens is arguably one of the best dance-pop songs of the 90's. Unfortunately, when the album was released, Nettwerk Records was short on cash and didn't have the resources to promote the album as much as its follow-up, the equally good, but more vocal, Karma. The song has simple drum and bass lines, and amazing vocals from the wide-ranged Kristy Thirsk, formerly of Rose Chronicles. Incantation is more of the same. Both are great tracks. The non-vocal songs are pure sonic ectasy. VERY complex layered tracks with a lot going on - multi-dimensional, for sure.
The Gregorian Chants in THIS album were sampled. Enigma was NOT sampled on this record, contrary to the claims of a previous reviewer. There are some similar hooks and feels, but Enigma somewhat defined this genre, but Delerium CLEARLY one-ups the entire field with this record. Enigma, by comparison (even MCMXC a.d.), is too poppy, too commercial, too forced. This is a purely good record based on the talents of the authors.
(BTW: Karma has fewer samples; they rented out a church in Vancouver and had real authentic monks sing their chants!)
If you'd like an in-depth song-by-song review, please check out the official web page at [...] - I have my full review posted in the discography.
But, in summary, if you like Enigma or Deep Forest, you will LOVE this album.
PS: If you like this album and/or Karma, I HIGHLY recommend Intermix's Future Primitives, which is a side-project of Leeb/Fulber (the same guys as Delerium) and recorded at the same time as Semantic Spaces, and basically could've been another Delerium album. I also highly recommend the upcoming Conjure One album, the new project by Rhys Fulber solo.