An orchestra called Autumn Leaf （オータムリーフ管弦楽団） is performing eroge and visual novel (and anime) songs for free. Looks like they’re an amateur group but they kind of do it out of their own expenses, so quite amazing.
Some songs they have performed:
– Nitroplus songs (Demonbane, Muramasa, Saya no Uta)
– Muv-Luv Medley ~Alternative~
– Tori no Uta (Air)
– Asphodelus (Aiyoku no Eustia)
– Kimi ga Nozomu Eien
– everlasting fantasia （ef―a fairy tale of the two.）
– Sora no Mukou ni (Symphonic Rain)
– Little Busters!
– Ranpin’ (Quartett!)
– Shukufuku no Campanera
– My Soul, Your Beats! (Angel Beats)
And this is their youtube channel. The sound is a bit low quality, I’m trying to find a way to get them higher quality…