I agree, removing the hiss would make the sound even nicer. :)
Nov 3 2015
Wow, awesome Joerg! A bug fix so fast!
Thanks for the response!
The last upload seems to have become embedded in an audio player... maybe that is just Chrome's doing. Anyway, the last upload (the 3rd upload) is the high pitch noise baked into an audio file so people can hear what it sounds like playing the original audio file (mvi_6317.wav) in Blender, with Blender configured to 44.1k instead of 48k sample rate.
I do not see any files? please upload the files
@Joerg Mueller (nexyon) mind testing this with new audio?
I would like to add a further note to this bug. One might be tempted to say that this is not a bug, because there is a solution to the problem, simple set User Preferences -> System -> Sample Rate appropriately.
On rendering a video, the audio artifact is baked into the resultant video/audio file. Now any video playing app (not just Blender) will produce the high pitch sound. See the file "mvi_6317_ARTIFACT_BAKED_IN.wav" to hear it.