Abstract: A vocal information system with the capability of retrieving and playing digital and audio data together with an audio system and associated cassette is disclosed. The audio system includes a housing, a communication bus, a bus connector, a radio receiver and a sound player. The housing has a slot for receiving a removable digital unit. The connector connects to the bus and to the removable digital unit and the sound player is selectably connected to the outputs of the radio receiver and the removable digital unit. Furthermore, the removable digital unit includes a digital storage unit for storing data thereon, a digital interface which communicates with an external digital processor and with the digital storage unit and a digital vocalizer at least for converting data stored on the digital storage unit to audio signals. The removable digital unit can be formed as part of a cassette, such as a cassette for a tape deck, or as part of a PCMCIA card.