i think this will work if you just want tossed him the song go to the top click on song then hit export mix down, and render the song to a wave, if he is interested it studio one there is a free version to get his wheels rolling. i have not shared stems before but the next button down on the song menu is export stems if you export the stems then he should be able to load it into his daw and work on your song too. hope that helps.