just to add.....
WAV file, 44.1k, 16bit...
track and mix at higher formats, final mix to 16bit 44.1k
TIP: on many systems (mine included) there are many file ---> save options, and several of them are WAV...this makes for a bit of confusion to the newbie...the only one that worked for me was...Microsoft PCM (*.wav)
which for trivia is, i believe pulse coded modulation, or some such shit