Java WebStart : Why does the application volume not adjust to the system volume

I've got a Java WebStart application which has an audio player in it that plays music. When testing the application (not running WebStart) the volume can be adjusted by adjusting the system volume.

However, when running the application via Java WebStart, somehow the 开发者_高级运维application volume absolutely ignores the system volume. Regardless of how much I adjust, or even mute, the system volume, the application volume is unaffected.

Does anyone have any ideas as to how i can troubleshoot this issue? It seems to be WebStart related somehow?

UPDATE:

This seems to be an Ubuntu or Linux specific issue. The application respects the system volume on Windows and Mac OS, but not on Linux.

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It seems that this problem, somehow, was related to the combination of a docking station I'm using and Ubuntu. I can't explain why it occured, but I can't be bothered as long as the problem is that specific.