Cambridge Audio Azur DacMagic Plus User Manual page 36

8
Cambridge Audio
Our Steep filter is a linear phase filter that has been optimised for stop band attenuation of close-in
aliasing images. Here we have traded a little attenuation of the very highest frequency response
(-2dB at 20kHz) and a little more pre- and post-ringing for a very steep attenuation just outside the
pass band. The Steep filter is able to attenuate aliasing at 22kHz by some SOd B.
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Time (samples}
Note: All filters exhibit the same ultimate roll-off of approximately 140dB.
36
Impulse response
160 180