Analogue

A continuous signal in which the message conveyed is a function of deliberate variations in the amplitude and/or frequency. It differs from a digital signal in that small fluctuations in the signal are meaningful.

Analogue television encodes picture and sound information and transmits it as an analogue signal. All systems preceding digital television, such as NTSC, PAL or SECAM are analogue television systems.

Analogue recording methods store audio signals as a continual wave in the magnetic field strength. This is different from digital recording, which converts audio signals into discrete numbers.