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Phillip Kerman
2004-01-05, 08:07
Using my ears I can definitely say that any VBR ripped CDs are muddy
sounding compared to a high rate CBR ripping. I would think VBR is good for
efficiency but even my non-audiophile ears can tell the difference.

I wonder what I'm hearing.

Thanks,
Phillip

Roy M. Silvernail
2004-01-05, 08:39
On Mon, Jan 05, 2004 at 07:22:16AM -0800, Jason Holtzapple wrote:
> --- Phillip Kerman <lists (AT) phillipkerman (DOT) com> wrote:
> > Using my ears I can definitely say that any VBR ripped CDs are muddy
> > sounding compared to a high rate CBR ripping. I would think VBR is good for
> > efficiency but even my non-audiophile ears can tell the difference.
>
> What encoder and what settings? Did you try a double-blind test
> with the CBR and VBR settings to eliminate any placebo effect?
>
> Generally it is accepted that the lame encoder version 3.90+ with
> the built-in vbr presets produce the highest quality files apart
> from plain 320 Kbps CBR.

I must agree. '--preset extreme' sounds, within the limitations of my
hardware and ears, indistinguishable from the original CD.
--
Roy M. Silvernail is roy (AT) rant-central (DOT) com, and you're not
http://www.rant-central.com is the new scytale
Never Forget: It's Only 1's and 0's!
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Wayne Mery
2004-01-05, 08:51
Phillip Kerman wrote:

> Using my ears I can definitely say that any VBR ripped CDs are muddy
> sounding compared to a high rate CBR ripping. I would think VBR is good for
> efficiency but even my non-audiophile ears can tell the difference.
>
> I wonder what I'm hearing.
>
> Thanks,
> Phillip

Should depend on what VBR settings are in effect. I'm not an expert, so
I'm interested in knowing people's experience with two EAC compression
options, lame DLL tab:
* "quality"
* "use VBR quality" (default=5/normal).

Questions:

1. Does higher EAC settings (0-9?) for "use VBR quality" have a
noticable effect (with lame). I.e. do you get better, near CBR quality
with the benefits of compression available with VBR?

2. Are the above setttings ignored if one specifies a 'preset like
"--preset extreme"?

From http://www.ping.be/satcp/eac12.htm ...

"Quality: In this drop down box the encoding quality can be set. Since
the best quality is what we need only set this to High Quality. -h:
Enables specialized mid/side masking thresholds to be used in jstereo
mode. Will sound better in jstereo mode but is about 20% slower. -h also
enables a more accurate but slightly slower quantization formula. Since
high quality is our goal, this parameter should always be used."

"Use VBR quality: The lower the variable bitrate encoding quality
number, the higher the quality of the encoded file. Thus a variable
bitrate encoding quality number closer to 0 will force LAME to encode at
a higher quality (use bitrates above the minimum allowed). -V m
(variable bitrate encoding quality: m = 0, 1, ..., 9) and set the
minimum allowed bitrate (bitrate: n = 8, 16, 24,... , 320 kbit/s)."

See also http://www.gamingforce.com/forums/showthread.php?s=&threadid=878

Thanks
Wayne