In the episode previews they use this music >
https://www.youtube.com/watch?v=8Mld4rmjnS0 it has a bit bigger part that it had in one of the PVs.
found ep 9 raw on nyan. I will soon post musics list :)
Episode 9 (
Subs here)
Musics
---------
- new bgm with beat and something that sounds like e.guitarish sounds
OP
- death gun theme bgm (old)
- sfx (old)
silence
- swordland arrangement with flute (old)
- bgm with accousti piano and electr sounds (old)
- piano bgm (old)
- bgm with elect sounds & percussion (old)
- silence
- bgm with sfx e.guitar and beat (new)
- silence
- bgm with strings beat (old)
- the other death gun theme
I think that at this point all bgms of the ost except 3-4 have been used.
so I can characterise the ost as disco-like/electronic with some strings/horn = epic and some piano pieces, there are also 2 REMI tracks, and 2 swordland arrangements, the flute and drums one, and the rockish one.
The episode with the most interesting music so far was the one with the desperado game.
also sites list the anime to have 24 episodes, hmm... so I guess they will do Mother Rosario as well ?
[EDIT]
http://www.swordart-online.net/package/2_vol3.html
「ソードアート・オンラインⅡ」第3巻
2014年12月24日(水) 発売
Blu-ray完全生産限定版 ¥7,800+税 ANZX-11125~11126
DVD完全生産限定版 ¥6,800+税 ANZB-11125~11126
■収録話
第7話「紅の記憶」
第8話「バレット・オブ・バレッツ」
第9話「デス・ガン」
■完全生産限定版特典
★キャラクターデザイン:足立慎吾描き下ろしジャケット仕様
★特典CD(「Original Soundtrack vol.1」収録)
★特製ブックレット(16P)
★特典映像
・川原礫黙認「そーどあーと・おふらいん つー」その3
※SDキャラ達によるキャラクターコメンタリー映像
★オーディオコメンタリー収録
DVD通常版も同時発売
¥5,800+税 ANSB-11125