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Politics : Formerly About Advanced Micro Devices
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To: Steve Porter who wrote (110809)5/14/2000 12:23:00 PM
From: Joe NYC  Read Replies (1) of 1572978
 
Steve,

Variable rate MP3s are nice. I cut most MP3s I make to variable rate. The only problem with variable rate MP3s (and perhaps why not many use them) is the size of the file is an unknown going in. I'm seen some (some older U2 for example) encodes at an average of about 89kbps. However some of the newer U2 tracks (with lots of different instrumetns etc.) encode at an average of 200+kbps.

I am using all VBR, all the time. My encoder has 5 different settings for VBR. At the highest quality settings, and the resulting file is generally about the size of 160 to 192kbs CBR (constant bit rate). But when I play it, the player reports usually 285 to 325, which may be the the peek density in the file. At this rate, I can't distinguish between the CD and the MP3 image.

The numbers (and file sizes) of VBR imply that it is almost twice as effective as CBR.

Joe
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