PORTABLE MUSICAL SYSTEM FOR KARAOKE AND CARTRIDGE FOR IT Russian patent published in 1998 - IPC

FIELD: musical equipment. SUBSTANCE: device mixes signal from external audio input, such as voice of singer singing song through microphone, and song accompaniment data, which are preferably stored in read-only memory unit, and outputs radio frequency signal for transmission to receiver. Goal of invention is achieved by introduced decoder for interface with cartridge through interface socket. Cartridge is equipped with encoder which is connected to read-only memory unit and is designed for interface with additional decoder of musical system through interface socket. EFFECT: prevention of unauthorized access to data which are stored in read-only memory unit. 5 cl, 1 dwg