Best tutorial I have ever seen
The sound effects are a very nice touch!
This is also the first tutorial I have ever learned anything from.
For quality settings, the property (not a function!) is _quality,
and can be set to "LOW", "MEDIUM", "HIGH", and "BEST".
For example: _root._quality = "LOW";
and just put that in a on(release) or whatever for a button and tadaa!!