[LAD] panning thoughts

[Philipp Überbacher]

Excerpts from David Olofson's message of 2010-11-13 18:24:26 +0100:
> On Saturday 13 November 2010, at 18.07.22, Philipp Überbacher 
> <hollunder at lavabit.com> wrote:
> [...]
> > One thing I wonder about is the exact value of the center. I've seen
> > panning in software between -1 and +1 and a center of +/- 0 where it
> > made a difference whether it was + or -.
> 
> That sounds like a bug to me. Incorrect sign special-casing, where the signal 
> is inverted in one of the cases...?
> 
> Although -0.0f is physically different from 0.0f on many platforms, that sign 
> bit shouldn't affect the results in this case, as the value is still 0.

I don't remember exactly what was off, whether it was just the display
or whether it resulted in different audio. Nevertheless it's annoying
and I don't quite know how to get rid of it entirely. Maybe display -0
or +0 as 0? In some languages you need to be tricky to achieve even
that, java comes to mind as it treats -0 == +0.