[vorbis] Digital Ear evaluation of Vorbis beta 4

[bob]

Does anybody have any such ratings as Frank B's relative to low (40Kbps and
less) data rates?

Bob Widergren
----- Original Message -----
From: "ff123" <miyaguch at usa.net>
To: <vorbis at xiph.org>
Sent: Thursday, April 05, 2001 11:38 PM
Subject: [vorbis] Digital Ear evaluation of Vorbis beta 4

> For those who haven't yet seen this:
>
> EarGuy's Digital Ear (physiological model of the ear based on work by
Frank
> Baumgarte) has just finished rating the sound quality of Vorbis beta 4 at
> 128 kbs using 30 random 10-second selections of music:
>
> http://pub41.ezboard.com/fr3mixfrm4.showMessage?topicID=33.topic
>
> Two samples on which the Ear says Vorbis performed uncharacteristically
> poorly are on my iDrive at:
>
>
https://www.idrive.com/miyaguch/files/Shared/?curr-node=8821135668693434409
>
> as s27VorbisTest.wav and s37VorbisTest.wav.
>
> After listening to them, I can probably agree with s37, which has a nasty
> laserbeam-like artifact starting at about 7.5 seconds, in addition to a
> noisy (fluttering) voice, for example at 3.5 seconds, and pre-echo in the
> snaps.  s27, though, is somewhat puzzling to me because I think it sounds
ok.
>
> Overall at 128 kbs, Vorbis definitely performed better than FhG FastEnc,
> and probably performed better than Lame 3.88b using --nspsytune at the
same
> bitrates (except for the two samples above, which pulled down its rating).
>
>  From my own subjective listening tests, I'd agree that Vorbis beta 4
> sounds better than the best mp3 codecs at 128 kbs for most music.
>
> ff123
>
>
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