This is an amazing 37 minutes of true techno. "Calabi Yau Space" feels to me like the kind of record that is instantly classic. The mood is that of the typical icy Dopplereffekt, but now with almost no obvious rhythm instruments throughout. The synths sound, for the most part, eerily distant, except for a few select moments in which the 'rhythm' breaks and Dopplereffekt takes a turn for glitch ('Hypersurface' is largely like this). The stereo-pan effects on 'Hyperelliptic Surfaces' and 'Mirror Symmetry' are excellent. This is a great record to hear through a good pair of headphones. Rephlex mystifies once again! Close out all other sounds around you and let Dopplereffekt rip your brain in two.