The example code at http://docs.unity3d.com/Documentation/ScriptReference/AudioSource.SetScheduledEndTime.html

does not compile. It is probably missing a type cast at some point. Anyway, the example does not work.

"Cannot implicitly convert type 'float' to 'int'. An explicit conversion exists (are you missing a cast?)"

2) How can we reproduce it using the example you attached

Just see the example code