"Interstellar" is definitely one of the best soundtracks of the year. Typically I am content to buy digital music these days -- but for Interstellar I wanted to own the CD as a both collectible and as a source of the highest quality of music.
As for the score itself, it is really great. I would say this is one of the cases where the music works better as presented in the movie than it does on it's own; but it is really a pleasure to listen to this music in any context. There is not a weak track in the bunch - I've listed my five personal favorites below. My only concern is that it left me wanting more, and indeed I was disappointed to find out that some tracks that I wanted were not included here (a few are available on iTunes, others remain unreleased).
There are only a few key themes here, and they are included a number of times on the album. An example: variations of "Day One", which I would call the main theme of Interstellar, can be heard in the tracks "Cornfield Chase" (where it is more upbeat) and "S.T.A.Y." (where it is more somber). This is not a bad thing to hear variations of the same theme, especially when it's so good.
 Cornfield Chase
 Day One
- Great music, one of Zimmer's best scores in recent years.
- The soundtrack comes in a neat digipak case with a star wheel (rotate the CD disc itself to see where the constellations are in the sky). It's an interesting concept that I find moderately amusing. This might be a con if you're one who likes a typical jewel case.
- Booklet includes liner notes from Hans Zimmer and Christopher Nolan. The story behind how the score was initially conceived is very unique and interesting.
- There are some notable tracks from key points in the film that are not included here. Certain music is usually omitted from most soundtracks due to not enough space on the disc to fit the complete score, but the choices of what was included/not included on the "Interstellar" album are quite odd.
- Most of Zimmer's recent soundtracks have included a voucher to redeem in the Z+ Music App, so you can hear the music with Headphone X technology (a cool concept if you have not tried it). Unfortunately, there is no voucher on the standard soundtrack release. Instead, you'll have to purchase the $40 'Illuminated Star Projection Edition' to get the Z+ redemption code.
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