Compact Discs

-these files are more compressed (10 to 14 times more compressed than a track on a CD) and therefore use less bytes, keeping the quality of files at the same level

-The difference between MP3 players and CD Players is that MP3 Players play from memory in the MP3s, rather than CD Players playing bytes from CDs

-Rather than a laser reading songs as in a CD Player, MP3 players there are parts that take the memory out of the song, then decompress it, put the memory through a digital to analog converter, and them amplify the sound

Playing MP3 files

EXAMPLE:
-Person presses play
-Microprocessor tells the DSP chip how to follow person's action as it sends information to the LCD screen to display the song info
-Microprocessor also takes song data and sends it to the amplifier, which sends sound waves through the audio port (head phones, speakers, etc.)
-Song is played

-MP3 Players are also different than CD Players in the fact that they play encoded files stored in the memory of the player, rather than in a CD

        -CD players rely on the bytes stored in CDs that can be interchangeable, depending on what the listener would like to hear
        -MP3 Players allow for many songs to be downloaded onto the player by connecting the player to a computer via a USB port and a ripping/encoding program on the computer
                -this allows for songs from more than one CD to be found at the push of a button

-MP3 Players do NOT use lasers

How do they work together?

-MP3s can be put onto CDs through certain "burning" programs on which the MP3s are sent to a CD to be stored for listening

-since MP3s are much smaller than normal CD tracks, the CD is capable of storing many more songs

This page is not that of a real company but is for a chemistry assignment for General Chemistry 140 at Monmouth College.