Ballade No.1 in G minor Opus 23 Frederic Chopin
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Neil Davidge: Halo 4 Original Soundtrack - an album guide
Davidge illuminates the rather unconventional technique for composing this particular track: "This was a 'Dictaphone' composition sung into my iPhone and accompanied by guitar. There was a natural pacing to the melody when sung, yet transcribing it threw up just how delicate and unorthodox the timings were."