[vorbis] Pitch shift with RC2

[Moritz Grimm]

Greg Wooledge wrote:
> > However, I didn't notice any pitchshifting - I always compile the
> > tarballs myself under Linux and everything works fine that way.
> I heard it on one sample, which I've already sent to Monty.  The
> hi-hat cymbals in one song sound significantly lower in pitch when
> I encode with Ogg at "-b 128".  I can't hear it at "-b 160", though,
> and I haven't heard it on any other songs yet -- but I haven't done
> extensive ABX testing yet, either.

I ogged my problematic bassrumble tune at all available bitrates, and
since I know my tune best I think I would have noticed such a thing. I
even compiled RC2 on SuSE 7.2, and despite Dr. Jörg Bergmann's warning
it had no such problems. On the other hand, the compiler can be a
problem source - OpenBSD 2.8 would crash on high FTP network traffic if
the kernel was compiled for CPUs > i386. The bug was triggered by the
GCC optimization for the more recent CPUs and they "fixed" it by taking
out the optimization parameter from OBSD 2.9's Makefiles.

Maybe this is some rather random problem that depends on what configure
chooses as parameters that are used within the Makefile, depending on
CPU (propably AMD vs. iNTeL? I am free from trouble with my Athlon here)
or so.

Moritz

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