The Music Maker theme does not include any membership sign up features. But you may be able to find a free or paid plugin online that offers the membership features you are looking for.
Here are 4 member related plugins that are built to support the Easy Digital Downloads plugin.
Articles on Membership
- Easy Digital Downloads Membership Sites
- Allow customers on a subscription to have access to all products
I have no affiliation with the links above and do not provide support for the plugins mentioned.
Has anyone found a 3rd party that works for this yet?