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Audio Clips Mixer Problem

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I have an application that plays audio clips as alerts. I select the mixer using:

Depending on the OS I may use a different mixer but the one I use does not matter to the problem. Once set 'useMixer' is referenced each time the code plays a clip. In my alert code I select the audio clip to be played thus:

Now for the problem. This code works just fine but only for a while. After playing several clips (I don't know if it is a fixed number or random) the code blows up with an error saying the mixer is not supported. Obviously that is a false error since that mixer worked fine previously. If I stop and relaunch the application the audio clips will once again play for a while.

The conclusion is that the mixer becomes somehow corrupted. The bottom line question is can the mixer be somehow reinitialized programmatically? I've spent hours trying to determine if and when the corruption occurs, if my conclusion is correct, to no avail so some kind of re-initialization is the most practical solution.
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