The Sigma Harmonics SOUNDTRACK is great stuff; proof that S-E can still come out with great, original music.
Last Hamauzu soundtrack I heard, aside from Dirge of Cerberus, was Samurai Legend Musashi - an infinite favorite; glad to hear that Hamauzu carried over some of what he used in there to here, namely his love of violin.
I dig the almost Wintery dissonance and echoey effects applied in some of the pieces; reminds me of the FFX OST, as well as the RahXephon anime OST; the ticking clock motifs are a nice touch, too.
Also got some really good, aggressive dance beats in places.
I hope this's a good sign that Hamauzu's all prepped and ready for the score for FFXIII.
Only one problem with the OST: Why so many short less-than-a-minute jingles?! You've an entire 72-78 minute disc to use! Why not USE that empty space?!