the participants were alf vierth ( vocals ) , björn eriksson ( drums ) , elä malmberg ( bass , background vocals ) , harald berthelsen ( mandolin , tin whistle , background vocals ) , martin linder ( saxophone , background vocals ) , rickard elofsson ( trumpet , background vocals ) , stefan ståhl ( guitar , background vocals ) , svante sörmark ( guitar , background vocals ) and viktor brobacke ( trombone , harmonica , vocals on rätt sätt and background vocals ) .