The Warner Premium Sound series is series of 2011 hybrid multichannel-stereo Super Audio CD/CD releases, which an important development in the format war between Super Audio CDs (SACDs) and DVD-Audio discs. It marks the first time that the Warner Music Group has released titles in the SACD format; previously they had endorsed the DVD-Audio format. In a parallel development in the United States, four albums by the Doors, titles strongly associated with the Warner Music Group, are also to be released on hybrid multichannel-stereo SACDs by Analogue Productions. Also Mobile Fidelity have been issuing and continue to be issuing SACDs of the Warner catalogue, but in the past these have been stereo-only discs, and for their new releases they do not specify whether a given disc might have multichannel contents also.
Super Audio CD/CD hybrid discs contain both an SACD layer and a standard CD layer. For the SACD layer, the recording is converted into a DSD file instead of the PCM Linear that ordinary CDs use. The DSD coding has a sampling rate of 64 times the CD Audio sampling rates of 44.1 kHz, for a rate of 2.8224 MHz (1 bit times 64 times 44.1 kHz).
The SACDs in the Warner Premium Sound series all include Direct Stream Digital or DSD coding of music with both a 5.1 surround sound and a stereo mix, as well as an ordinary Compact Disc or CD coding with a stereo mix, on separate layers; that is, they are hybric multichannel-stereo discs. Thus these discs can be played on any CD player, although the playback of the DSD contents, most importantly multichannel mix, the require a Super Audio CD compatible player. So far this series comprises ten rock and pop record albums, most of which have previously been available in the DVD-Audio format in North America.