CD Changer: Separate units that may allow the user to hear any of 3 to 120 discs, or more in whatever order they wish to program them, or to skip from one track to another, or from one disc to another. Many of these come with separate controller units that allow for user operation and programming. Some are built to take advantage of controller systems built in to many receivers expressly for that model. Many also have a device called an FM modulator that permits connection to any standard FM stereo radio. The signal can be heard on whatever unused frequency the radio is tuned to. Most changers also permit direct audio outputs to any standard RCA high impedance, line level, input. This is the preferred input to avoid noise and distortion that may occur with radio usage.

 

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ICD-10: tenth revision of the International Classification of Diseases published by the World Health Organization, Geneva (1992)