A compact disc that contains both Red Book audio information as well as Yellow Book computer data. All of track 1 is reserved for computer data; the following tracks contain the PCM audio.
CD that comprises tracks of two or more different types, e.g. one or more data tracks followed by one or more audio tracks. Various options are available to implement audio and data on the same disc, including CD EXTRA.
A compact disc including both computer data and CD-DA tracks. The data is all contained in Track 1, and the audio in one or more following tracks. Contrast with CD Extra.