Opendisc is an Enhanced Music CD application for enabling multimedia content when a compact disc is played on a personal computer

Personal computer

A personal computer is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end-user with no intervening computer operator...

. Opendisc asserts that its technology conforms to the Blue Book specification

Blue Book specification

The Blue Book or Enhanced Music CD specification describes the Enhanced Music CD format. The first session of an Enhanced Music CD contains audio information according to the Red Book...

 and does not contain copy-protection functions. However, various computer users have reported that it interferes with third-party playback and ripping

Ripping

Ripping is the process of copying audio or video content to a hard disk, typically from removable media. The word is used to refer to all forms of media. Despite the name, neither the media nor the data is damaged after extraction....

 applications, effectively functioning as Digital Rights Management

Digital rights management

Digital rights management is a class of access control technologies that are used by hardware manufacturers, publishers, copyright holders and individuals with the intent to limit the use of digital content and devices after sale. DRM is any technology that inhibits uses of digital content that...

. Since version 2.0, Opendisc embeded a direct link to a default audio player such as Windows Media Player or iTunes. Because of this, many CDs now simply feature access to a Web site of the specific artist, which feature exclusive music, videos, and photo content. Like a Google alert, a user is informed of artist updates via e-mail.