Download a free DAT to WAV converter software program. (See References.) Install the program.
Launch the program. Click "Add Files" and navigate to the DAT files you want to convert.
Click the DAT files, then click "Open." Select "to WAV" from the drop-down menu.
Click "Convert." Each DAT file selected will be converted to a WAV file. To combine several DAT files into one WAV file, click "Convert to One."