What are the differences between analog and digital technologies?

In analog technology, a wave is recorded or used in its original form. For example, in an analog tape recorder, a signal is taken straight from the microphone, and laid onto tape.

In digital technology, the analog wave is turned into numbers that are stored in the digital device. To hear the music, the numbers are turned into a voltage wave that resembles the original wave.

The big advantage of digital technology is that the recording does not become distorted with time. As long as the numbers can be read, you will always get exactly the same wave, and the same sound.

An Analog computer AKAT-1

Sound Cards

 Sound cards or audio cards enable the input and output of audio signals to, and from a computer. A computer with a sound card can produce 3-D audio, for surround sound playback for DVDs. It can also capture and record sound from external sources too.