To take advantage of the Prime Day music deals on Amazon itself, the answer is yes. If you’ve never been a Prime member before, Amazon often offers free trials (right now you can sign up for a 30-day free trial, so you could be tactical and sign up just before the event, then cancel your subscription once you’ve bagged a bargain.
If you’re a regular Amazon shopper, you might want to keep hold of that subscription though. Prime members get faster delivery, exclusive deals, access to Prime Music, Prime Video, and more.