[Ardour-Users] FFTW & calf -- was Re: Basic set of cross-platform plugins?

Robin Gareus robin at gareus.org
Sun May 31 14:30:52 PDT 2015

On 05/31/2015 04:28 PM, jonetsu at teksavvy.com wrote:
> On Wed, 6 May 2015 09:26:04 -0400 Thomas Vecchione
> <seablaede at gmail.com> wrote:
>> 5. At the time the fftw bug was really affecting CALF in Ardour 
>> limiting it's usefulness
> FWIW, some Calf plug-ins crashed Ardour 3.x and I was told this was
> due to the fftw bug.  I compiled them from source and the problem
> remained. Then I upgraded to Ardour 4.0.0, did not recompile the
> Calf plugins, did not change the OS, etc, and the problem went
> away.  This is testimony :)

The bug is a race condition. Triggering the issue depends on a lot of
things. Unless you use recent calf (which don't use fftw anymore),
you're probably just lucky with Ardour4 so far.

Various work-arounds exist, see https://github.com/FFTW/fftw3/issues/16


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