The answer is: both!
First, upload a mix as your main Audio Record so everyone can hear it by just hitting play.
You can then upload your individual tracks (the ones which make up that mix) as your Working File. The Working File is a secondary file that stays joined with the main mix file.
This Working File gives the community access to your individual tracks and layers, and it's at the heart of how we collaborate on Record. So...
Always include your individual tracks in your Working File. Without them, the chances of your music getting REmixed are practically nil.
Please make sure all your individual tracks or stems begin at the same point in time; Ideally, at the very beginning of the song or lead-in count... that way, other collaborators will be able to drop them into their own timeline and get to work with no fuss.
For more information on what a Working File is and how to upload one, please CLICK HERE.
If you have any questions about audio uploading to the site, please reach out to us at firstname.lastname@example.org and we will get back to you as soon as possible.