[SoX-users] problems with libsox on Mac OS X

[Julien E. <jey...@gm...>]

I am trying to integrate libsox into a cross-platform Qt application (a
concordancer for sound-aligned labelling of speech). I have integrated the
source code into my application and as a first step, I'm simply using libsox
for sound playback.

The playback function is based on the code in example3.c. It works fine on
Windows and Linux, but I'm experiencing a couple of problems on Mac OS X
(10.6, macbook 4,1):

- the most outstanding one is that I'm able to flow effects only once. If I
try to play a second sound, it either doesn't play anything or segfaults
somewhere in sox_flow_effects().

- the second one is that mono files seem to be played twice as fast (and
with a pitch twice as high) as they ought to (tested with FLAC and WAV
files). I worked around this by converting the input to stereo before
playback, but I thought I would mention it since it only happens on OS X.

I would appreciate any insight into these problems (especially the first
one). These problems still remain in 14.3.2-rc2.

Thanks,
Julien.

-- 
"And please don't cook me, kind sirs! I am a good cook myself, and cook
better than I cook, if you see what I mean." The Hobbit, J.R.R. Tolkien