Does digital EQ shift phase?

Jump to Latest
#3
mdpaudio said:
Analog EQ shifts phase on boost or cut, does a EQ done in the digital domain have the same phase shift?
Click to expand...

Yes , a minimum phase eq (99.9999% of all eqs digital or analog) has phase change with eq locked by the hilbert transform (iirc)

There are few eqs that don’t shift phase, those are mostly for mastering not playback.

There are also some specialty fir type eqs that have that ability but it is not needed for playback…

When you eq something to a flat you are also fixing phase, so eq is beneficial because it fixes frequencies and phase simultaneously..

There are some things that are to be considered to be non minimum phase that eq can’t fix, but that is an acoustical issue not a eq issue.

Hope that helps
 
#4
Thanks for that info. It focuses on recording and source material, I’m looking for in room eq of a DSP and it’s affect on the speakers output. Does the DSP eq mess with the phase? If so, it could be used for good or evil on an in room speaker system.
 
  • Like
Reactions: Oabeieo
#5
Yeah dsp and Analog eq and even caps and coils in a crossover all share the same amount of phase shift that I described, and as long as your using it to flatten the response (where the mic is being used to measure it) it will also fix phase at that spot as well.

So yes eq is always beneficial when used properly.

When not used properly you can run into some strange things like the timing of the eq not being correct but the frequencies are to start and a few others.
 
#7
You always want to use regular eq to fix frequency response and it will fix phase


I think if your trying to not change phase , then you want fir filters to erase phase shift caused from crossovers and phase shift caused by speakers

That’s not done in eq, it’s done in linearizarion all pass filters….

You should download rephase and play with it, you learn everything you want to know…
 
You must log in or register to reply here.
Top Bottom