Brother,
Your question is a general one, no details.
If you simply want to upload, then use a free software as filezilla. Login with your user name and psw. Create online a folder in root, something like
http://www.catholicchurchgeek.com/Garage_Band or another name, drag and drop the mp3 file(s) in this folder. And wait

I have no idea what you want to do specifically, but it quite easy and free. You use just the features given by your hosting provider.
Of course, then you should create/edit page(s) linking the music files. Dreamweaver or Notepad, it does not matter. It is easy.
I will visit your site to see what you did.
God bless you!