1) Analogical - Digital converter.
2) Digital - Analogical converter.
1 - An analogical - digital conversion consists of the transcription of analogical signs in digital signs, with the intention of facilitating his prosecution (encriptación, compression, etc.) and to make the resultant sign (the digitalis) more immune to the noise and other interferences to which the analogical signs are more sensitive.
2 - The digital-analogical conversion is a process that allows the reading of the binary code recorded in a CD. It has the same sampling rate (controlled by a clock) with that the sound was recorded in the cd and it has a certain bits quantity. With this device the cds can be read and be reproduced. That's why the name: It turns of Digitalis to Analogical.
Extracted from the Wikipedia.
