Vorbis - Sep 2005 - OFF-TOPIC audio fade curves

This is off topic but I'm sure many subscribed here may be able to help. 
I'm writing an audio player, which includes vorbis of course, for the
broadcasting industry and I need to prematurely fade out songs before they have
finished.  I've tried a linear and a logarithmic fade but neither sound
natural to me.

I was never good at logarithms in school and that was a long time ago.

Can anyone provide a formula which provides a fade that the ear would perceive
as even and  steady?  Or even better, a variable way of adjusting the log curve
between logarithmic and linear.  I've searched the Net but haven't found
anything useful.

Many thanks,
Ross.
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On Wed, 2005-09-14 at 22:50, Ross Levis wrote:
> This is off topic but I'm sure many subscribed here may be able to
> help.  I'm writing an audio player, which includes vorbis of course,
> for the broadcasting industry and I need to prematurely fade out songs
> before they have finished.  I've tried a linear and a logarithmic fade
> but neither sound natural to me.
Googling for audio fade curves yields:

http://www.transom.org/tools/editing_mixing/200309.stupidfadetricks.html

It says there, "For a general-purpose default fade, I really like the
'S' fade: the cosine curve."

Hope this helps,

Carsten.