if no one knows about this topic...
Any suggestion of an alternative viable method of using 3D-Sound (.ogg-files) with Java is appreciated as well.
Just in case anyone has the same problem:
There is a class similar to WaveData, called OggData, but it has to be decoded first (using the class "OggDecoder").
A pretty solid explanation of the stuff can be found here:
It is a tutorial for the sounds of a game made with LWJGL, using .ogg-files and the sound-buffers for 3D-Sound (althougt I think they did not acutally implement the 3D-effect).