No digital rights management, allowing for playback on any device.
An iTunes Plus AAC encode uses psychoacoustic modeling to ensure that these complex frequencies do not get compressed into generic digital noise, preserving the punch of the low end and the crispness of the cymbals. Chronological Journey Through the A7X Discography
Even the perfect collection will sound flat on bad hardware. To appreciate the difference:
From underground metalcore pioneers to stadium-filling hard rock icons, Avenged Sevenfold's evolution is staggering. Here is how their discography translates to the iTunes Plus M4A experience. 1. Sounding the Seventh Trumpet (2001) Raw, aggressive, unpolished metalcore.
To fully appreciate the iTunes Plus AAC difference, try these A7X tracks on a good pair of headphones or a decent home stereo system:
