Regal - if the reinstall doesn't fix it sounds like a library issue.
Delete Audacity App and its related files found in your ~/Library
Run Disk utility and repair permissions
then reinstall Audacity
Run Disk utility and repair permissions Again
Should work. If not your codecs need to be reinstalled which is probably unlikely but you may have to. this will be at the root level of your Mac under your /Library and system/Library.
Regal - if the reinstall doesn't fix it sounds like a library issue.
Should work. If not your codecs need to be reinstalled which is probably unlikely but you may have to. this will be at the root level of your Mac under your /Library and system/Library.