[vorbis-dev] Audo quality problem

[John Morton]

On Thu, 05 Feb 2004 06:06, Simeon Maxein wrote:
>  Hello.

>  So I just went on using mp3 for synthesized music, until I recently read
> your FAQ (the point about reporting artifacts). Afterwards, I encoded my
> samples again with the latest release version (vorbis-tools 1.0.1 for
> Windows) and checked the output from both the winamp plugin and oggdec. The
> artifacts are still there. You can download the encoded and the original
> samples from people.freenet.de/chaossoft/vorbis/ to check my results.

The Product has a definite white noise hiss added in some sections; I wouldn't 
call it annoying, but it was pretty obvious on my cans. This might be similar 
in cause to the noise I hear in the crowd applause sections of various live 
albums I've encoded. I find it goes away at q7, so I encode my live stuff at 
that, and the rest at 4.99 (for historical/hysterical reasons). You might 
want to add techno-industrial to that category.

Chordian also has something going on; it's subtle as you said. It'd 
characterize the original's main voice has having a sort of tremelo(?) 
effect. It sort of warbles between two tones like, maybe, a mandolin, but 
much faster. In the encoded version this effect seems to be lost as if it 
were smeared or masked - probably pre-echo.

Can't say I know how to fix this, however :-)

John

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