The sound themes generator, at the moment anyway, creates a folder with the name you typed in there, along with a configuration file. To make your theme, you still need to use your preferred file manager of choice to replace the files with those you want to use. From what I get from the messages we translators get, in the next big release coming up, which I don't know if he calls it 2.4 or 2.3.6, he's going to simplify this process so that you can do the file replacement within Elten