|MLA Citation:||Bloomfield, Louis A. "Question 737"|
How Everything Works 21 Jun 2018. 21 Jun 2018 <http://howeverythingworks.org/print1.php?QNum=737>.
The same isn't true of analog recording on a cassette tape. Cassette audio is recorded in an analog form—as magnetizations of the tape surface that are proportional to the air pressure fluctuations associated with the original sounds. During playback, these magnetizations of the tape are analyzed and used to recreate the sounds. But the tape itself introduces imperfections in the reproduced sound. The information read from the tape during playback isn't quite the same as the information that was recorded on the tape at the manufacturer's plant. The tape isn't perfect and the sound that's reproduced by a tape player isn't quite the sound that was originally recorded.