Watch John Coltrane: Blue Train (2015) : Full Movie Online Free Universal Music Group has gone back to the original master tapes to deliver fully uncompressed, high-resolution versions of many of your favorite albums on Blu-ray Pure Audio Disc. Mastered at 24bit/96kHz, Blu-ray Pure Audio Discs deliver the sound the artists originally heard in the studio when these classic albums were recorded. These discs provide all the recorded musical information. While convenient due to their small file size, today’s heavily compressed music files do not represent the true fidelity of the original album.