Complex sentence: The group is an active participant in "carnaval" each year, and its music group (or "Banda") has released records in its own right, as well as featuring on recordings by stars such as Daniela Mercury.
Split into simpler sentences: The group is an active participant in "carnaval" each year. Olodum's music group (or "Banda") has released records in its own right and has benn featured on recordings by stars such as Daniela Mercury.