Analog to digital and the other way around

Analog signal is a continuous signal. I am going to use an example of voice for this example. Voice of a singer in a concert is an analog voice, but MP3 file with the same song is in digital format. Analog signal in this example a voice, is a continuous change of the data. Digital form of the same song is transforming analog signal to data that can be easily stored by a computer. Higher the number or the bitrate, better the quality of that recording is going to be. The same principal applies to video as well.

It is impossible to perform this operation in opposite way, take digital format and convert it to analog, because digital format has less information than analog.

Example of data in analog format are vinyl disks. Music quality there is much better than in CDs, or MP3s but vinyl disks are less portable.

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