1. WAV file format
2. Created with filter PCM, any Hz and/or bit rate, mono or stereo (filter MPEG-layer 3 didn't work). I used VLC and did a 26 second clip at 64 kb/s to get under the file size limit
3. There seems te be no limit in length of time of the sound
4. Filesize limit of approximately 5 mb.
5. Must be put in the Windows folder