You can play an item from the Browser and define the speed (from very slow to very fast). To do so :
•Select an item in the Browser.
•Click on "Play" 
A progress bar is displayed. And a volume button to set the sound level as well.
By clicking on the Lock icon, it is possible to modify separately the level for the left and/or the right channel.
While playing a sound, or even when it is paused, if you click a second time on the button , it will place the cursor 5 seconds before the end.
•Do a right click on the progress bar. a window is shown as follows :
•Choose the speed of your item.
For information :
50% : Plays very slowly
75% : Plays slowly
100% : Plays normally
150% : Plays quickly
200% : Plays very quickly