▁vel vet - cover ed ▁ma ce ▁or ▁s cept re , ▁N ah ara ▁drums , ▁and ▁a ▁medium - s ized ▁mounted ▁g ong . ▁The ▁ens emb les ▁in ▁Per ak ▁and ▁Sel ang or ▁have ▁the ▁same ▁instrument ation , ▁while ▁that ▁of ▁Ter eng gan u ▁includes ▁not ▁only ▁the ▁fl ute , ▁medium ▁drums ▁and ▁tr ump et , ▁but ▁also ▁the ▁G end ang ▁Neg ara ▁or ▁S aku ▁k ett le ▁drum ▁and ▁a ▁set ▁of ▁cl ash ▁c ym b als . ▁Kel ant an ' s ▁has ▁an ▁additional ▁ser un ai ▁plus ▁ 2 ▁reb ab ▁l utes , ▁ 2 ▁large ▁g ongs , ▁and ▁ 2 ▁more ▁g end ang ▁an ak . ▁ ▁During ▁the ▁installation ▁of ▁the ▁Yang ▁di - P ert uan ▁Ag ong , ▁the ▁Nob at ▁will ▁play ▁the ▁t une ▁Pal u Pal u ▁Mel ay u ▁as ▁the ▁royal ▁reg alia ▁are ▁bor ne ▁into ▁the ▁Bal air ong ▁Ser i ▁( th r one ▁room ). ▁Other ▁songs ▁played ▁during ▁the ▁Install ation ▁r ites ▁are ▁I sk and ar , ▁Bel ay au , ▁Nob al ▁Tab al , ▁Per ang , ▁I bra him ▁K hal il ▁and ▁Ser i ▁Ist ana . ▁ ▁The ▁leader ▁and ▁conduct or ▁of ▁a ▁Nob at ▁ensemble ▁is ▁known ▁as ▁the ▁Mah ag uru , ▁and ▁is ▁responsible ▁for ▁the ▁mus icians ▁under ▁him ▁and ▁for ▁the ▁care ▁and ▁maintenance ▁of ▁the ▁instruments