webaudio_orientation example is off by 90 degrees

[looeee]

The webaudio_orientation example seems to be off by 90 degrees, assuming that it's not supposed to be possible to hear the music from behind the red wireframe box.

As a side note, I think the example would have more impact if the "wall" was not wireframe - perhaps it could be made slightly transparent instead?

[Mugen87]

Thanks for finding this bug. It was introduced with #15424. We missed that audios might have no playback controls (like in the example) so isPlaying is always false.

I've tried to improved the demo according to your suggestions. The wall is now transparent which looks indeed a bit better.