The only point I'd add to Dane's notes is that I have read advice around not
setting your variable floor too low. I'd suggest for music that you set the
floor to 128kbps rather than the suggestion below of 16kbps.
Regards.
Kevin
E-mail: kevin.llo...@sky.com
----- Original Message -----
From: "Dane Trethowan" <grtd...@internode.on.net>
To: "PC Audio Discussion List" <pc-audio@pc-audio.org>
Sent: Saturday, December 26, 2009 7:33 PM
Subject: Re: Pros and cons of varible bit rate
I suppose it comes down once again to personal preference, I've been using
varriable bit rates for youears.
As I understand it, encoding with a varriable bit rate takes a lot longer
as the encoder looks at every sample of the song thus deciding what bit
rate it should be encoded at, silence for example is encoded at a lower
bit rate than a full sample of orchestra sound, minimum and maximum bit
rates for variable encoding are set up with your encoding engine such as
LAME so for the best and accurate results you're better off doing this
sort of thing manually with a command line so use an app which supports
this, Exact Audio Copy is an excellent choice here.
Their are several methods of VBR encoding, "Old" and "new", "new" is
quicker for those jobs you want out the door fast but quality isn't quite
as good if you're picky, with today's flying processor speeds you may as
well use "Old".
Also note that some older players may not handle VBR playback though I
haven't struck one that doesn't yet.
Suggested minimum and maximum bit rates for VBR? Well just use the minimum
and maximum rates available or if you're configuring from a command line
or a piece of software that takes full advantage of the LAME-ENC.dll
library then 16 bits for the minimum and 320KBPS for the maximum, there
are 2 quality settings you have to be aware of here, one is VBR quality
and you may wish to change this for certain audio material you're
encoding, say music and talking books. The other quality setting leave at
maximum, will take longer but far better results.
On 27/12/2009, at 6:21 AM, Jamie Pauls wrote:
The subject is a question, not a statement. I have been uploading Main
Menu archives as a 128KBPS MP3 file. I see that many people recommend
192KBPS, but there a parts of the show that really don't need that high a
bit rate. In fact, I have also read that encoding at too high a bit rate
can cause unwanted artifacts just as much as encoding at too low a bit
rate. Variable bit rate seems a good choice for me to use, but I would
like some thoughts from audio experts. Thanks.
Jamie Pauls
MSN: jamiepa...@hotmail.com
Skype: jamie.pauls
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Dane Trethowan
From Melton Victoria Australia
mailto:"grtd...@internode.on.net
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blog: http://www.grtdane.wordpress.com
Phone United Kingdom
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