text: Drum and bass ( also written as `` drum 'n' bass '' and commonly abbreviated to D&B or DnB ) is a type of electronic dance music which emerged in the mid 1990s .
simplified: Drum and bass ( also d & b , DnB , dnb , d' n ` b , drum n bass , drum & bass , dNb ) is a form of electronic dance music . It began in 1990s in the United Kingdom .