Test direction. A Sound node can have its "direction" field changed by clicking on any of the 3 buttons in the left portion of this world. Each will change a Sound ellipsoids orientation along one of the 3 axies (X, Y or Z). As a result, sound audibility should be confined to the inner portion of the particular ellipsoid that is aligned with the Sounds direction. Clicking on a button, and then using the worlds Viewpoints to navigate in and out of the 3 ellipsoids should verify that a Sound is audible only along its current "direction" ellipsoid.

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