If you want to change any of the settings to the audio you’ve inserted you can do this by right-clicking on the Audio place holder and selecting Audio Properties.
The Audio Wizard will be loaded and that audio file will be automatically loaded. You can now change any of the settings you like.
Once you have finished making the necessary changes click on the Next button or go straight to the last tab and then click on the Generate button. If you’ve not made any changes to the actual file format the new settings will be generated instantly. If you have made changes to the format on the second tab the audio file will be regenerated in that format.