[vorbis] I hate myself for asking this, but...

[k_myers at irito.com]

I would have to say that Vorbis does have problems with bass response.

Here are two examples side by side....

http://www.djlithium.com:8064/djlithium.ogg (vorbis stream at 96kbps using
350kbps oggdrop encoded files run through Oddcast Beta 25)
and http://24.113.1.24:8040/listen.pls (128kbps Mp3 stream using
KasterBlaster, Oddcast DSP beta 25 and source mp3 files encoded at 128kbps
or 256kbps).

The problems I have been hearing are that because of the "pre-echo" bass
does not seem as present as it usually is when compared to the MP3 stream or
the mp3 files. I was listening to the native Ogg 350kbps version of State of
the Union on-demand streaming from KasterBlaster yesterday with another copy
in mp3 running on a seperate box coming from my other server at 256kps
on-demand (check my site for the on-demand links in mp3 format at
www.djlithium.com under the streaming section), and I can definately hear
the difference. I have tried both sets of head phones (Sony MDR-7506 and
Sony MDJ-700's) and the presence of bass in the Ogg version is almost half
that of the MP3 version.

Does bit rate affect this in anyway? I am listening to the 96kbps ogg stream
now, an its actually got more bass in it then the 350kbps files, and it also
seem there is more "pre-echo" in the 350kbps versions. I use some spacial
expansion effects on the mastering of the waves before I encode them, but
these wave files were used to generate both the MP3 and Ogg versions with
effects on for each, so I am guessing the outcome would be completely
independent of that, but I am wondering if Ogg (or Vorbis really) has
problems with dealing with signals that are very wide in stereo image.  Does
this make sense??

let me know.. I am interested in hearing what other people are hearing.

The on demand vorbis version of state of the union is located at
http://www.djlithium.com:8000/dj_lithium_state_of_the_union.ogg and the
96kbps version is being streamed now through
http://www.djlithium.com:8064/djlithium.ogg so if you tune in in the next 20
minutes you can get a listen to both side by side; and see if I am nutz or
not.

Lithium

----- Original Message -----
From: "Gian-Carlo Pascutto" <gcp at sjeng.org>
To: <vorbis at xiph.org>
Sent: Sunday, September 09, 2001 3:39 PM
Subject: Re: [vorbis] I hate myself for asking this, but...

> ----- Original Message -----
> From: "Ignacio Vazquez-Abrams" <ignacio at openservices.net>
> To: <vorbis at xiph.org>
> Sent: Sunday, September 09, 2001 11:56 PM
> Subject: Re: [vorbis] I hate myself for asking this, but...
>
>
> >(the bass was a little
> >stronger in the .wav).
>
> Did you ABX this?
>
> All reports of Vorbis losing bass I have seen so
> far have been bogus, so I'd love to see a sample.
>
> --
> GCP
>
>
> --- >8 ----
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--- >8 ----
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