http://unique-note.co.jp/demo.html
Unique Note has updated their website to include demo samples. The quicktime player on the demo page isn't working for me, so I looked at the html source and found the direct mp3 links. I've included guesses about the composers in parentheses.
Devil May Cry 2011 TGS Trailer
http://www.unique-note.co.jp/listen/Dmc.mp3.mp3
(Tetsuya Shibata)
Unique Note Original Demo
http://www.unique-note.co.jp/listen/original_01.mp3
(Tetsuya Shibata; Vocals by Tetsuya Shibata & Yoshino Aoki)
Earth Seeker
Main Theme Part 1
http://www.unique-note.co.jp/listen/earth_seeker_01.mp3
(Yoshino Aoki)
Main Theme Part 2
http://www.unique-note.co.jp/listen/earth_seeker_02.mp3
(Yoshino Aoki; vocals by Yoshino Aoki)
Home Town
http://www.unique-note.co.jp/listen/earth_seeker_03.mp3
(Yoshino Aoki)
Battle Theme
http://www.unique-note.co.jp/listen/earth_seeker_04.mp3
(Tetsuya Shibata)
Suikoden Tierkreis
Town / Village Music (aka Naineneis theme)
http://www.unique-note.co.jp/listen/...uikoden_01.mp3
(Yoshino Aoki)
World Map Music (aka World Map 2)
http://www.unique-note.co.jp/listen/...uikoden_02.mp3
(Yoshino Aoki)
I always knew Aoki had a great voice, but that main theme part 2 sample from Earth Seeker is incredible. She's easily one of the best VGM vocalists I've ever heard. She doesn't have the stereotypical Japanese female sound at all.
As for the main theme, it's great--although the first part is very similar to the main theme from The Mask of Zorro. The village theme is excellent as well. It's a shame Earth Seeker bombed, as that significantly hurts chances for an OST release.