I wanted to post to express my appreciation to Shadson and tell Midzuki to somewhat behave since I felt he was way too harsh in this thread, but well, things are improving in this matter !
Tried to play without tweaking a very old ffdshow version installed and it worked despite a somewhat agressive sound (I guess it might be due to resampling).
I have just installed the latest SVN ffdshow version to compare.
Anyway thanks for your effort Shadson. Keep up the good work !