48
3
3:
 3  MPEG3 .
 3  CD-ROM, CD-R  CD-RW.
  3, ,  ISO 9660. 
3, .
      3,    ,  
“.mp3”.
     3 ,   “.mp3”,   
.
      ,  “ MP3” “”,  
 PC “” “” .
      8,   .
 448.
 .
 , , 3.
  8   VBR,  
 ,       
. VBR: .