Currently Being ModeratedJul 3, 2013 1:00 PM (in response to Steven Shmerler)
I found the answer myself finally. I simply opened the lecture mp3 files in a sound editor (Adobe Sound Booth) which has very accurate movement capabilities.
You could probably use many non iTunes apps that will allow you to move second by second. Some probably even free.
Hope that helps if this is an issue for you. It only is an issue when listening to lectures that I need to back up to get my notes correctly.