Hi Justin,
Welcome to the forum.
I presume you have already bought the domain name from a domain name registrar. You'll need to buy a service which allows you to create a record on a primary domain name server which points to your IP address. If you have a fixed IP address, that will be the one to use, but if you have a dynamic address, then you'll need to make sure the DNS hosting company can provide a dynamic DNS service.
If you rent webspace from your ISP (e.g. on their servers), but have your Broadwave server on a different address (e.g. on your broadband connection at home), then you'll need two DNS entries, one for the web space and the other for the stream.
I don't use such a service myself as my ISP automatically provides both, but there are many companies out there which offer this service for a few pounds a month. Do a search on the internet using the following terms: domain name management dns.
If you haven't bought a domain name yet, then any of these companies can register one for you too.