@Bastien Montagne (mont29) Here's the list of versions of the package i currently have, with the direct dependencies:

blender 17:2.77-1
boost-libs 1.60.0-2
desktop-file-utils 0.22-1
ffmpeg 1:3.0-1
fftw 3.3.4-1
freetype2 2.6.3-1
glew 1.13.0-1
hicolor-icon-theme 0.15-1
jack 0.124.1-6
jemalloc 4.1.0-1
libpng 1.6.21-1
libsndfile 1.0.25-3 (OK) / 1.0.26-1 (KO)
libspnav 0.2.3-1
libtiff 4.0.6-2
openal 1.17.2-2
opencollada 20150702-3
opencolorio 1.0.9-4
openexr 2.2.0-3
openimageio 1.6.10-1
openjpeg 1.5.2-1
openshadinglanguage 1.7.1-1
opensubdiv 3.0.2-3
ptex 2.0.62-2
python 3.5.1-2
python-requests 2.9.1-1
shared-mime-info 1.5-1
xdg-utils 1.1.1-1

I also made another list with all dependencies:

I'll make the list whenever i have some time.
In the meantime, i opened an issue on Arch: https://bugs.archlinux.org/task/48679

Indeed, i'm using the one provided from my distro. I just downloaded the latest official build and i confirm there is no issue with it.
Thanks a lot and sorry for the bother.

Sorry to tell you that even after updating to 17:2.77-1 (hash 7f03e7c), i still have the issue.

Sorry, here's a small test project with a MP3 file and a FLAC file.