▁recording ▁other ▁Vis ay an ▁custom s . ▁Custom s ▁such ▁as ▁Vis ay ans ' ▁aff inity ▁for ▁singing ▁especially ▁among ▁their ▁war rior - cast es ▁as ▁well ▁as ▁the ▁playing ▁of ▁g ongs ▁and ▁b ells ▁in ▁naval ▁batt les . ▁ ▁Their ▁custom ary ▁method ▁of ▁trad ing ▁was ▁by ▁bar ter ing ▁one ▁thing ▁for ▁another , ▁such ▁as ▁food , ▁cloth , ▁cattle , ▁f ow ls , ▁lands , ▁houses , ▁fields , ▁slaves , ▁fish ing - ground s , ▁and ▁pal m - trees ▁( both ▁n ip a ▁and ▁wild ). ▁Sometimes ▁a ▁price ▁interven ed , ▁which ▁was ▁paid ▁in ▁gold , ▁as ▁agreed ▁upon , ▁or ▁in ▁metal ▁b ells ▁brought ▁from ▁China . ▁These ▁b ells ▁they ▁regard ▁as ▁pre cious ▁j ew els ; ▁they ▁res emble ▁large ▁p ans ▁and ▁are ▁very ▁son orous . ▁They ▁play ▁upon ▁these ▁at ▁their ▁fe asts , ▁and ▁carry ▁them ▁to ▁the ▁war ▁in ▁their ▁boats ▁instead ▁of ▁drums ▁and ▁other ▁instruments . ▁ ▁The ▁American ▁anth rop ologist - histor ian ▁William ▁Henry ▁Scott , ▁qu oting ▁earlier ▁Spanish ▁sources , ▁in ▁his ▁book ▁" Bar ang ay : ▁Six teenth ▁Century ▁Philipp ine ▁Culture ▁and ▁Society ", ▁also ▁recorded ▁that ▁Vis ay ans ▁were ▁a ▁mus ically ▁mind ed ▁people ▁who ▁sang ▁almost ▁all ▁the ▁time , ▁especially ▁in ▁battle , ▁saying : ▁ ▁Vis ay ans ▁were ▁said ▁to ▁be ▁always ▁singing ▁except ▁when ▁they ▁were ▁sick ▁or