The 2009 Deluxe Edition was released in several formats, including a and a rare Collector’s Box Set limited to 1,000 copies. For audiophiles, the compilation is available in FLAC (Free Lossless Audio Codec) format through digital retailers, providing a bit-perfect reproduction of the studio masters for a high-fidelity listening experience.
When searching for the you are looking for a specific digital footprint. Here is what that package contains:
By 2009, the digital music landscape was fracturing. MP3s had won the portability war but lost the fidelity battle. Enya’s music—constructed on hundreds of vocal overdubs, synthesized pads, and deep, resonant piano—suffered immensely under lossy compression. The shimmering decays of “Orinoco Flow” turned into digital artifacts; the bass pedals of “The Memory of Trees” became muddy.
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A file preserves the original 16-bit/44.1kHz CD-quality audio exactly. The "exclusive" nature of this release refers to the fact that for a long time (2010–2015), this specific 2009 remaster was only available in FLAC format on premium audiophile trackers and boutique digital stores (like HDTracks and Qobuz), never on standard streaming.