How it works
Creating a "Pre-Release Tracks" album allows you to deliver just the tracks as they are released and still report the physical component.
Step-by-step-instructions
Go to Music > Digital Releases from the left sidebar.
Click + Create Digital Release and choose Pre-Release Tracks.
Fill in the details of your release and set the release date to match your physical album’s release date.
Add your audio files and specify individual release dates for each track.
Click Review for Sale then Ready to Publish then Attach to Existing Products.
Search for the products you want to bundle with the tracks, then input the following information for each attachment:
Enable Deliver to existing orders.
Disable Managed fulfillment.
Set the Reporting type to your physical album, this is what Single will report
Click Create Attachments.
Now, customers who pre-order your physical album will receive the pre-release tracks on the dates you set.