PS Audio PerfectWave Owner's Reference Manual - page 10

Control & Operation

®

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15-042-21-1 Rev A

Instruction i

©2010 PS Audio International Inc. All rights reserved. 

Filter 1 MP APOD

Minimum phase Apodising filter. Low pre-ringing, minimal 

group delay, minimized post ringing, good phase vs. frequency, 

sharper filter cutoff

Filter 2 MP SOFT

Minimum phase soft knee filter. Low pre-ringing, minimal group 

delay, minimized post ringing, good phase vs. frequency, soft 

cutoff.

Filter 3 LP APOD

Linear phase Apodising filter. No group delay, perfect phase vs. 

frequency, minimal post ringing, some pre-ringing, sharper filter 

cutoff.

Filter 4 LP SOFT

Linear phase soft knee filter. No group delay, perfect phase vs. 

frequency, minimal post ringing, some pre-ringing, softer filter 

cutoff.

Filter 5 MP 1/2B

Minimum phase recursive Half Band symmetrical filter. 

Minimized pre and post ringing, good group delay, good phase 

vs. frequency response, sharp cutoff.

Phase (Polarity)

Touching this control on the front panel touch screen (or the 

remote) will invert the absolute phase (polarity) of the audio 

signal. This is the same thing as reversing the loudspeaker 

inputs, placing + to – and – to +. 

Phase reversal happens on 

many recordings, sometimes even within the same CD or DVD. 

If the track sounds a little “off” try reversing the phase with this 

control to see if the CD track gains a bit of proper perspective. If 

it does, chances are good that it was recorded out of polarity.

Owner’s Reference

Perfect Wave DAC