| rootsFilter roots and gain as needed for block implementations |  | 
|  | Return low pass filter roots as needed for block for given cut-off frequency | 
|  | Return high pass filter roots as needed for block for given cut-off frequency | 
|  | Return band pass filter roots as needed for block for given cut-off frequency | 
|  | Return band stop filter roots as needed for block for given cut-off frequency |