If you play it on the VLC media player I think it has a wider range of speeds than the other media players
www.videolan.org/vlc/
Just right click the File (after installation) select
Open with VLC and the Program will do the rest. The basic Controls are straight forward to "slooow down" click once on the
"Double Black arrows" on the Left of the bar. To speed up click on the Right
"Arrows" The play speed is indicated in the small box adjacent to the Track /time box
The default is
"1.00x"