Sound osgAudio::Sample use findDataFile?

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I modified the osgaudio example to use findDataFile() to locate the high-
e.wav file when calling the Sample constructor. However, as Sample is in the 
osgAudio namespace, it seems like the constructor should call findDataFile() 
on behalf of the application (the osgaudio example should not have to do 
this).

This is somewhat complicated by the fact that Sample is just a facade over 
equivalent classes in the back-end, where you typically would not want to 
call into osgDB.

Original issue reported on code.google.com by SkewMat...@gmail.com on 10 May 2010 at 10:07

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Original comment by Burroma2...@gmail.com on 12 Dec 2014 at 3:03