The OOYH version: I tried testing the various presets, but I don't know which preset was used exactly, sounds like the Revel Ultima or Marten Momento V2 preset was used. However, I can say that while there's still reverb (both in the pre-recordable file and (some of) the better presets), her voice is still clear, and 'closer' to what I can hear from the speakers in front of me.
I do not think producing waveforms closer to the original means anything....you can think of it this way:
Source file (Waveform
A) > Speakers Output 'recorded' by our ears (Waveform
B) <----
desired
With headphones, now the 'speakers' are strapped to our ears, it becomes...
Source file (Waveform
A) > Headphone Output 'recorded' by our ears (Waveform
C) <----
undesired (*from virtual surround perspective)
Then the virtual surround filters come in and they seek to make...
Source file (Waveform
A) > Find how Waveforms
B and
C are related, plus consider the equipment (speakers / room / headphones) then somehow magically make a filter that produces > Headphone Output (Waveform
D), that
sounds like Waveform
B
I am obviously grossly understating the process here, but my feeling is while Waveform D will still look like a variation of Waveform A, it probably needs to be transformed in weird ways just so that it gets 'interpreted' by our ears as Waveform B when it comes out from headphones.
You may want to talk to the developer for the Impulcifer software as well
https://www.head-fi.org/threads/recording-impulse-responses-for-speaker-virtualization.890719/