def bandpass(data, low=80, high=1200, rate=44100, order=6):
 (b, a) = _butter(order, (low, high), rate)
 return lfilter(b, a, data)

def bandpass ( data , low = 80 , high = 1200 , rate = 44100 , order = 6 ) : ( b , a ) = _butter ( order , ( low , high ) , rate ) return lfilter ( b , a , data )
return bandpass filtered data .