This command allows selection of the default format presented when saving sound files. This is the target format that will originally be selected by default when you open the dialog boxes associated with file saving operations.
If you plan to convert many files to the same format, it makes sense to select this format as the default. If you do not, you will need more manual intervention when you use Vox Studio. Selecting the right default here will make working with Vox Studio much smoother.