How to slow music playback speed
I've seen on the Internet a number of posts about how simple it is to slow down the payback speed of a song so that you can learn to play parts of the song. Many say this is built into Quicktime, and you simply click the windows tab and select show a/v controls. There is even a pdf file showing this in the dropdown menu. But on my system, the show a/v controls does not appear on the windows drop down menu. I have version 10.2 of the quicktime player. Has this feature been removed? If not, where is it now? Thanks.
MacBook Pro, OS X Mountain Lion (10.8.3)