This invention relates to a karaoke CD format and a device for controlling audio signals utilizing the karaoke CD format which provides a user with selective reproduction of the voice of a player. The karaoke CD format includes a CD format divided into video sectors and audio sectors. The audio sectors are further divided into a part for recording accompaniment sound and playing sound at the same time and a part for recording accompaniment sound only. There is provided record coding information for distinguishing the parts. An apparatus, method and storage medium for processing digital data are discussed. According to an embodiment, the apparatus includes an audio/video data processor to receive data units of digital audio data and data units of digital video data, the data units of digital audio data being multiplexed with data units of digital video data, the data units of digital audio data corresponding to at least one of: 1) a first type of digital audio data, and 2) a second type of digital audio data which includes at least one content different from the first type of digital audio data; each type of digital audio data being specified by attribute information, which has: a) first information for indicating a coding mode of the digital audio data, and b) second information, different than the first information, for identifying one of the first type of digital audio data and the second type of digital audio data, and the digital video data associated with two types of digital audio data.