Type:	Maximally flat (Butterworth) digital low pass filter
Slope:	selectable from 6 dB/Octave to 192 dB/Octave
Step response overshoot:
	1.788 dB at 192 dB/oct
	1.604 dB at 96 dB/oct
	1.316 dB at 48 dB/oct
	0.897 dB at 24 dB/oct
	0.370 dB at 12 dB/oct
Stop Band Attenuation:	> 260 dB

Plotted below is the amplitude response for a 1.0 kHz cut frequeny at 44.1 kHz sampling rate for a number of filter slopes.

.