Brass Swing Hlola Valveyenziwe ngethusi elifojiwe, elibizwa nangokuthi i-valve engabuyi, eklanyelwe ukulawula ukuphuma emuva kwesistimu yokulawula uketshezi, uketshezi luqondiswa i-disc ehambayo futhi lugeleza lubheke ohlangothini olulodwa, olusetshenziselwa kabanzi ukudonsa amapayipi, ukupompa, namapayipi.