▁t ours , ▁including ▁playing ▁at ▁the ▁National ▁E isted df od ▁in ▁B ala . ▁▁ ▁In ▁summer ▁ 1 9 6 7 ▁they ▁released ▁their ▁one ▁and ▁only ▁single , ▁Ma es ▁B . ▁The ▁band ▁ens ured ▁their ▁gig s ▁were ▁well ▁public ised , ▁and ▁as ▁well ▁as ▁distinct ive ▁post ers ▁and ▁fly ers ▁they ▁used ▁bill boards ▁to ▁advert ise ▁themselves . ▁Despite ▁dis band ing ▁in ▁the ▁aut umn ▁of ▁that ▁year , ▁their ▁place ▁in ▁Wel sh ▁music ▁history ▁was ▁secured ▁and ▁arte fact s ▁by ▁the ▁band ▁are ▁now ▁in ▁the ▁possession ▁of ▁the ▁National ▁Library ▁of ▁Wales ▁and ▁the ▁Museum ▁of ▁Wales . ▁ ▁Form ation ▁In ▁the ▁ 1 9 6 0 s ▁music ▁in ▁the ▁Wel sh ▁language ▁was ▁still ▁largely ▁influenced ▁by ▁male ▁voice ▁cho irs , ▁chap el ▁and ▁traditional ▁N os on ▁Law en ▁singing . ▁The ▁pop ▁music ▁that ▁did ▁exist ▁in ▁Wel sh ▁was ▁generally ▁light ▁ac oust ic ▁folk ▁music ▁having ▁little ▁in ▁common ▁with ▁the ▁current ▁f ash ions ▁in ▁Ang lo - American ▁pop ▁and ▁rock ▁releases . ▁▁ ▁As ▁social ▁att itudes ▁changed ▁during ▁the ▁ 1 9 5 0 s ▁and ▁ 1 9 6 0 s ▁the ▁out look ▁of ▁many ▁younger ▁Wel sh ▁speak ers ▁also ▁started ▁to ▁change . ▁Following ▁the ▁out c ry ▁over ▁the ▁destruction ▁of ▁Wel sh ▁speaking ▁villages ▁to ▁build ▁projects ▁such ▁as ▁dam ▁supp lying ▁water ▁for ▁cities ▁in ▁England ▁there ▁was ▁an