The Best EQ-Matching Equalizer VST

[monomaker]

Sounds like OP is trying to reinvent spectral synthesis?

After that he'll realise he needs the spectrum to do a non-linear morph over time, so will probably wind up with wavetables. The next problem is accurately representing the time dependant attributes as they attack and decay, so that usually requires a greater number of wavetable frames. Halion 6 is good for this, you can reconstructed some sampled sounds if you think about it a bit and have hundreds of frames.

EQs aren't designed for this sort of thing, probably be better with an FFT freeze and then try imposing an envelope on top (Unfiltered Audio Spec Ops can do this), but I think the wavetables method will be the best.

[andymcbain]

I have not tested them, but as far as I know some of the TDR eqs have also matching function. Not sure how detailed they can be. Maybe worth to check.

Not that detailed really, but they get you in the ballpark in a natural sounding sort of way. Something like Equivocate is a lot more savage in this regard (but still surprisingly useable)

[ahmedyaser100]

Somebody already mentioned iZotope OZONE?

Yes, I tried it but I had some problems with it like not being able to directly edit the matching curve or draw my own.

[jacoustics]

At some point you’ll probably run into the limitations of EQ matching itself. Even with huge FFT sizes, low frequencies are notoriously difficult to match accurately because of windowing, phase interactions, and the way most matching algorithms smooth the spectrum.

Personally, I’ve moved away from chasing perfect EQ matches and focus more on comparing against reference tracks. We recently released a free plugin called jReference that helps with that by showing tonal balance, loudness, dynamics, stereo image, and other mix metrics alongside your reference tracks.

You can check it out at jacoustics.com if you’re interested.