You can use our Variations and Variants feature to set up a choice of options such as size, color, etc. for any single product.
A music album is also a single product. You can choose to either combine all the tracks into a
.ZIP file to sell as a single product, or set up each track as their own separate products and then add one more product for the album using our Bundle Other Products to have it issue a collection of links for the single-track files.