a ▁pan pipe - like ▁Th ai ▁instrument ), ▁harm onica ▁ ▁Th ong k ran ▁Th ana ▁- ▁lead ▁guitar , ▁slide ▁guitar , ▁viol in , ▁vocals ▁ ▁Music ▁ ▁Sur ach ai ▁J ant im ata wn ▁was ▁the ▁band ' s ▁primary ▁vocal ist ▁and ▁song writer . ▁ ▁He ▁also ▁played ▁guitar . ▁ ▁W iras ak ▁S unt orn si i ▁played ▁guitar ▁and ▁also ▁did ▁occas ional ▁bass ▁and ▁lead ▁vocals . ▁ ▁Mong kh on ▁U th ok ▁sang ▁lead ▁and ▁played ▁ph in ▁( a ▁Th ai ▁string ed ▁instrument ), ▁harm onica , ▁w ut ▁( a ▁pan pipe - like ▁Th ai ▁instrument ) ▁and ▁saw ▁( the ▁Th ai ▁version ▁of ▁the ▁Chinese ▁er hu ▁viol in ). ▁ ▁Th ong k ran ▁Th ana ▁played ▁viol in , ▁slide ▁guitar , ▁as ▁well ▁as ▁lead ▁guitar ▁in ▁the ▁band ' s ▁later , ▁electric ▁inc arn ations . ▁ ▁They ▁were ▁often ▁joined ▁by ▁Ph ong the p ▁K rad on ch am nan , ▁later ▁a ▁well - known ▁ph l eng ▁ph ue a ▁ch iw it ▁artist ▁in ▁his ▁own ▁right , ▁on ▁Th ai ▁per cussion , ▁fl ute ▁and ▁vocals . ▁ ▁Car avan ▁was ▁known ▁for ▁combining ▁Th ai ▁and ▁Western ▁folk ▁music ▁in ▁arrang ements ▁domin ated ▁by ▁ac oust ic ▁gu it ars , ▁but ▁sp iced ▁up ▁with ▁U th ok ' s ▁use ▁of ▁traditional ▁Th ai ▁instruments , ▁as