Analogue and Digital
The analog record is a recording method using the magnetism.
This method reproduces the form of the signal of the sound faithfully.
The analog record reprinted the unevenness of the ditch and the magnetic strength and weakness of the tape.
The analogue means a method that transmits input signals called an analogue transmission system ; the data are continuous.
On the other hand, the digital means that data are discrete. The subset of a continuous aggregation is in an interspersed state separately to be discrete. The analogue can handle any numerical value, but express a sound only ambiguously. There is the numerical value that we cannot express digitally. However, the digital data can reproduce the object which they can express faithfully. A digital record such as a CD, a MD and a DAT become the height of prosperity now. At present when you make a call, it is common that you use digital telephone line network system, regardless of your likes and dislikes. That is to say, using your telephone makes your voice digitized.