'Tenebrys' opens the album at 82 BPM in F Major, and that number is already a statement: it carries a peak-time techno tag while running at half the tempo the tag implies. Gianni Parrini, DJPool75 and SAIMON LIVE put the chant ahead of the rhythm for 4:38, and that hierarchy defines the whole record: here the Gregorian voice doesn't decorate, it structures.
The jump arrives with 'Santa Memoria': from 82 to 148 BPM with no stops in between, the most violent leap on the tracklist. What keeps it from snapping is the harmony: still F Major, the same key as the opener, a thread that turns what could be a brutal cut into an acceleration of the same material. It's the record's only main-floor trance moment, and its 4:08 works as an early climax on an album that afterwards prefers middle temperatures.
'Domine', subtitled precisely 'Gregorian Trance', is the thesis in miniature: 126 BPM in A-flat Minor and the shortest cut of the lot at 3:58. It helps to know who signs it. Parrini is a historic figure of the Romagna Riviera: resident at Riccione's Cocoricò since 1990 and the DJ who coined the term 'dream music' in 1993 to name his melodic fusion of house, techno and trance. Heard from that angle, this Gregorian project is no gimmick: it's the same pursuit of spiritual trance he has been chasing for over three decades, now sung in Latin.
The final stretch belongs to the Parrini–DJPool75 duo —SAIMON LIVE appears only on the first seven cuts— and that's where the record turns contemplative: 'Authority' stretches its 4:59, the longest track here, at 86 BPM. The closer, 'Adoro Te Devote', brings everything home: 84 BPM and F Major again, the tempo and key of the opening. Five of the eleven cuts live in that key, and that circle —leaving F, climbing to 148, returning to F— is the album's real structure, far more than the genre tags that change from track to track.
Sources: Wikipedia · Beatport