DualDisc

The DualDisc was a type of optical disc that combined audio and video content on a single, double-sided disc. One side was a standard CD, containing music tracks, while the other side was a DVD, featuring additional content such as music videos, interviews, and behind-the-scenes footage. The DVD side was often playable on standard DVD players, though the CD side adhered to the Red Book audio standard.

DualDiscs were introduced in 2004 by a consortium of record labels, including Warner Music Group, Sony BMG, and EMI. The aim was to offer consumers a more comprehensive package for music releases and to combat music piracy by providing added value. The format saw limited adoption by artists and labels, with many major releases opting for traditional CD or DVD formats.

The technology behind DualDisc involved using a thinner layer of polycarbonate on the DVD side to allow the laser for CD playback to focus on the CD layer, and vice versa. However, this thinner layer sometimes led to compatibility issues with certain CD players, as the discs were slightly thicker than standard CDs. This, along with the often-limited nature of the DVD content for many releases, contributed to its eventual decline in popularity.

By the late 2000s, the DualDisc format had largely faded from the market. The rise of digital music downloads and streaming services, as well as the increasing availability of high-definition video formats, made the DualDisc less appealing to consumers. While some niche releases may have continued to utilize the format, it never achieved widespread mainstream success.