Home / Forums / Melodica technique / Sonny Boy Williamson Apparently Covering the Outlet Slots on His Harmonica / Reply To: Sonny Boy Williamson Apparently Covering the Outlet Slots on His Harmonica Reply To: Sonny Boy Williamson Apparently Covering the Outlet Slots on His Harmonica February 7, 2017 at 7:56 pm #8210 QuetscherParticipant Thanks a lot, Lowboy! I used my Clavietta Labourdette for better bendings and a mouthpiece that is shaped a little like a small clarinet mouthpiece. You can see it on one of these photos: Clavietta Labourdette