Because DVD-Video provides a maximum of eight sound streams and each stream can record up to five AC-3 audio channels, DVD is an extremely versatile entertainment medium.

For example, depending on the software used, you can sing along guided by the vocals of the professional singer or sing a duet with the artist. These and other functions are standardized. The vocals can be recorded in multiple languages--Japanese, English or whatever.

With AC-3 5-channel recording, the producer can assign the stereo accompaniment to the front left and right channels, for example, and the guide melody to the center channel. For a duet, for instance, the rear left channel can be utilized for the male vocalist and the rear right channel for the female vocalist.

If desirable, the producer can substitute guide vocals for the guide melody.

To enjoy these versatile functions, either a player with karaoke capabilities or an AC-3 karaoke amplifier is required. With some players it will be possible to cancel playback of some of the audio data (vocals).

With the eight sound streams, it is possible to store multiple versions of the same number, for example, with different instruments, arrangements or keys. Using the caption highlight function, the text of the lyrics displayed on the screen is highlighted to help the user keep pace with the music.