Riffmasterpro slowdown music app

How to instantly slow down music so you can play your favourite songs riffs.  
Riffmaster Pro for <Windows>
Check out the latest Windows Version here, load up a difficult section in Riffmaster pro and discover just how easy it is to become a better player Now. 
Riffmaster Pro for <Mac>
Fire up Riffmaster pro on your Mac and start playing like you have always wanted to see more Riffmaster Pro for <iPad iPhone>
The popular desktop application now on iPhone and iPad see here.