If you have a bug to report, need help, or wish to suggest a feature, please feel free to use the Emms mailing list. The address of the list is email@example.com. To subscribe to it, visit http://lists.gnu.org/mailman/listinfo/emms-help.
If you are familiar with the Gmane service, there is a Gmane newsgroup which mirrors this mailing address at gmane.emacs.emms.user.
Emms also has a website at http://www.gnu.org/software/emms/.