To your last point on Music: There is a Your Lie in April CD album that the Sony has released containing all of the classic pieces of the show as performed by the show's pianists (Tomoki Sakata & Eriko Kawachi) and violinist (Yuna Shinohara). You can hop on YouTube to find their recording of Introduction & Rondo Capriccioso.
You can find the full CD on Amazon, though it comes with a hefty 30 USD price tag as an imported product. And obviously wait until you have finished the show first.
Also love the Love DVD-A disc! Pink Floyd DSOTM on 5.1 SACD is outstanding, even if at the risk of being cliche. I also have a 5.1 SACD of the 1812 Overture and other Tchaikovsky works performed by Erich Kunzel and the Cincinnati Pops which uses a very engaging implementation of surround sound for the cannons leading to, and throughout the crescendo. Amazon link
I like you. I played sax for 6 1/2 years, studied musicianship for 4. One of my teachers was adamant that Bach was best, without question, he even bought Bach 2000 when it came out and brought it to class. I often use a Mozart collection when I study, it's like it makes me smarter. Even with some historical inaccuracies I just love the directors cut of Amadeus, which I think is on Netflix. If not that then either vivaldi's four seasons or Hungarian rhapsody no 2
The spotify list mentioned earlier is awesome. I highly recommend it. Specifically, though, I have three songs that I use to test out headphones (which also are great for fun/bassy types):
Foy Vance - She Burns
1812 Overture (this version with the badass canons at the end)
Blue Man Group - Above
EDIT:
If you ever splurge on some hi-fi speakers, definitely use that telarc version of the 1812 overture to demo them. With the right setup you'll damn near feel THX certified.
On top of the answers already provided there are 2 more soundtracks.
Shigatsu wa Kimi no Uso Boku to Kim to no Ongakuchou = all the performances in the show
Shigatsu Wa Kimi no Uso Twinkle Little Star = Other performances related to the show
The stereo studio cycle he recorded for EMI in the late '50s/early '60s. It has been reissued a few times. Recently there was a big box released of the symphonies and overtures, but that comprises all of his recordings including a mono and stereo Fifth and three versions of the Seventh, so it may be a bit more than you want. An older box set, and the one that got me into Klemperer, is this one which includes the stereo symphony recordings, selected overtures, and the five piano concertos with Daniel Barenboim on piano.
Are you thinking of the Telarc recording maybe? The LP is known to jump track on many turntables due to the extreme bass from the canon shot.
And if you'd like to buy the album, head here: http://www.amazon.com/Greatest-Video-Game-Music/dp/B005QW1FB0
You'll also be able to find it on iTunes, amongst many other online stores I'd imagine. There's just something about a live orchestra playing memorable themes from my childhood that floods me with nostalgia!
Is it the Kashmir from Symphonic Led Zeppelin by the London Philharmonic Orchestra? Because that whole album is AWESOME!!
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$9.99 on Amazon.com, $18.12 on Amazon.ca