▁of ▁Ker ala ▁music ▁lies ▁in ▁the ▁domin ance ▁of ▁per cussion ▁instruments , ▁having ▁its ▁roots ▁in ▁the ▁traditional ▁k av u ▁rit ual ▁music ▁and ▁the ▁natural ▁environment . ▁Modern ▁Ker ala ▁gives ▁us ▁hints ▁of ▁the ▁sources ▁from ▁which ▁these ▁early ▁mus icians ▁had ▁created ▁such ▁a ▁mighty ▁and ▁powerful ▁music : ▁the ▁ham mer ing ▁sound ▁of ▁the ▁wood pe cker ; ▁the ▁various ▁sounds ▁of ▁falling ▁rain ▁on ▁leaves ▁or ▁that ched ▁roof s ▁in ▁the ▁long ▁ra iny ▁season ; ▁the ▁cro aking ▁of ▁the ▁fro gs ▁after ▁heavy ▁ra inf all ; ▁storm ▁and ▁wind ▁moving ▁the ▁leaves ▁of ▁trees , ▁bush es ▁and ▁grass . ▁Or ▁the ▁man - made ▁sounds : ▁the ▁regular ▁noise ▁of ▁wood ▁cutting ▁and ▁cho pping ; ▁the ▁was her ▁women ▁be ating ▁the ▁dirty ▁clothes ▁onto ▁the ▁stones ▁at ▁the ▁river ▁or ▁temple ▁p ond . ▁The ▁Mal ay ale es ▁only ▁distinguish ▁two ▁forms ▁of ▁music ▁k ut uka ▁( to ▁drum ) ▁and ▁p att u ▁( to ▁sing ). ▁The ▁term ▁p att u ▁is ▁also ▁used ▁for ▁solo ▁instrument al ▁gen res , ▁with ▁instruments ▁like ▁k uz hal ▁( ob oe ) ▁and ▁kom bu ▁p att u ▁( horn ). ▁ ▁Per cussion ▁dom ination ▁means ▁that ▁the ▁musical ▁framework ▁of ▁the ▁pieces ▁is ▁not ▁determined ▁by ▁a ▁mel ody ▁or ▁ra ga , ▁but ▁consists ▁of ▁a ▁very ▁s oph istic ated ▁rh ythm ical ▁structure ▁and ▁content . ▁The ▁‘ mel