57
3
3:
·3  MPEG 3 .
·3  CD-ROM, CD-R  CD-RW.
· 3,  ,  ISO 9660. 
3, .
·    3,    ,  
.mp3.
·    3 ,   .mp3,   
.
·    ,   MP3  ,  
 PC .
·     8,   .
 448.
·.
·, , 3.
·  8  VBR,    
,  
. VBR: .