To understand why the portion of the keyword is so vital, one must look at the production of the album itself. Continuum is widely regarded as a reference-quality recording. The production is warm, spacious, and dynamic, largely avoiding the "loudness wars" that plagued many mid-2000s releases.
Some argue that because Continuum was tracked analog but edited digitally (Pro Tools HD at 48kHz), a file is technically upsampling. While mathematically true, the mastering makes the difference. John Mayer - Continuum -2006 Pop- -Flac 24-96-