Nass El Ghiwane were the first band to introduce Western instruments like the modern banjo .
The group , which originated in avant - garde political theater , has played an influential role in Moroccan chaabi ( or shaabi ) .
group     were the first group to introduce Western instruments like the modern banjo .
The group , which originated in avant - garde political theater , has played an influential role in Moroccan chaabi ( or shaabi ) .