muski;231024 Wrote: > > I am surprised by the phase behavior of both filters in the low freqs. >
That phase response may not be as bad as it looks. The point is that if a filter is linear phase it's perfect (just as good as 0 phase shift), because linear phase is simply a time delay. That's because if f(t) = sin(\omega t + \phi), when \phi -> \phi + c \omega for some c that doesn't depend on \omega, it's the same thing as shifting t -> t + c. On a plot like that linear phase means a line of a constant slope, but of course the lines will wrap around from -180 to 180. That's more or less what it looks like at least up to 2kHz or so. And I assume this plot has been smoothed, which might account for the apparent change at high frequency. -- opaqueice ------------------------------------------------------------------------ opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=38758 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
