Re: How to configure AudioConverter to write VBR?
Re: How to configure AudioConverter to write VBR?
- Subject: Re: How to configure AudioConverter to write VBR?
- From: Jens Alfke <email@hidden>
- Date: Sun, 8 Feb 2009 16:42:53 -0800
I'm getting more and more confused, turning the various knobs
available to me and comparing the results.
I did a test at 96kbps, because that's about the point where the
compression artifacts really start to become obvious to my ears. But
it's the numbers, not the subjective quality, that don't make sense.
96k, CBR, medium quality: QT Player reports 93.16kbps. Fair enough.
96k, VBR, medium quality: 93.39kbps, and that value doesn't change as
I play through the file.
96k, VBR, highest quality: 177.3kbps(!), again constant during the
file. And as expected, this file is nearly twice as large as the others.
Shouldn't it be the bit-rate setting that fundamentally sets the file-
size? I would expect VBR to improve audio quality without significant
effect on size, and "high-quality" to slow down the encoding process
and improve audio quality, again without much effect on file size. But
I must be wrong … so how does it really work?
—Jens
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