may have one group with a stereo mix sampled at 192 kHz with a resolution of 24 bits, while a second group may have a multi-channel (surround sound) mix sampled at 96 kHz with a resolution of 24 bits.
Typically there are several different groups on a DVD-A disc. Normally each group contains the same number of tracks, each with the same musical selections, although presented in various formats. There may also be a menu group intended for navigation when using a video display. These menu groups are of little use with the Ayre C-5xe, as it does not include any video circuitry.
However, some DVD-A discs are organized so that multiple audio formats are stored as separate soundtracks within a group. The “Audio” button on the remote control handset will allow the desired soundtrack to be selected.
When this type of DVD-A disc is playing, the first press of the “Audio” button will enter the mode whereby the soundtrack may be selected. The “GUI” symbol will illuminate on the front panel display for five seconds, and additional presses of the “Audio” button during this period will scroll through the available soundtracks.
In an additional level of complexity, the groups are contained in a title set. Only DVD-Audio players can access the Audio Title Set, but nearly all DVD-Audio discs also contain a Video Title Set for backwards compatibility with DVD-Video players. The Ayre C-5xeMPwill only access the Audio Title Set, ignoring any content in the Video Title Set.