You can try Spats Transaural thing. I honestly think you'd be better off
building a quadraphonic installation from scratch rather than trying to
convert things. By all means use your binaural recording s in it - but be
aware the interaural time differences can cause a slight phase difference
between speakers which can lead to comb filtering and a kind "weakening "
of the sound - I've never liked any of my binaural recordings over speakers
(I used those little soundman things)
Good luck!

On Fri, 5 Mar 2021 at 13:01, Marc Lavallée <m...@hacklava.net> wrote:

> That's what I'm looking for: a simple bodge, to be able to use stereo
> and/or binaural recordings that could be available instead of FOA
> recordings; I don't want to miss opportunities to record something
> interesting because I don't have a 5th order microphone, only for some
> interactive entertainment...
>
> Transaural can be amazing, and it could work for my use case...
>
> Thanks for the tips. I may fail miserably, but it's worth a try.
>
> Marc
>
> Le 21-03-05 à 06 h 44, Dave Hunt a écrit :
> > Hi Marc,
> >
> > Yes, this is very difficult to do properly but a simple bodge is
> surprisingly effective. Undoing the built in binaural encoding from the
> original recording is next to impossible.
> >
> > I have done what is suggested in the ambisonic.net sources in Max. XY
> or polar coordinates place the left and right channels at variable points
> on a circle in a 1st order ambisonic encoder, giving a basic B-format
> output. This image can then be rotated by fairly simple maths to alter the
> coordinates of both channels together, or by rotating the B-format signal.
> The rest is done by an ambisonic decoder.
> >
> > Once in B-format, the WXY components can be manipulated; gain, eq,
> directional dominance. You can also apply a Z coordinate to move the image
> up and down.
> >
> > The result is undeniably diffuse, but usable. Generally binaural
> recordings sound OK as normal stereo, obviously without the proper spatial
> impression.
> >
> > Interesting effects are also achieved by treating stereo as UHJ and
> deriving B-Format from that. I think there is something on that on
> ambisonic.net, as well as super stereo and Dolby stereo.
> >
> > Transaural crosstalk cancellation only works over a very small area, and
> becomes more complex for quad. Many such systems go for some form of
> closely spaced dipole speaker layout, possibly with extra speakers. The
> University of Southampton had something like that, but references might
> take some finding.
> >
> > Ciao,
> >
> > Dave Hunt
> >
> >
> >> On 4 Mar 2021, at 17:00, sursound-requ...@music.vt.edu wrote:
> >>
> >> From: Marc Lavallée <m...@hacklava.net>
> >> Subject: [Sursound] binaural to FOA?
> >> Date: 4 March 2021 at 13:55:42 GMT
> >> To: Surround Sound discussion group <sursound@music.vt.edu>
> >>
> >>
> >> I have a "back to the basics" question.
> >>
> >> For a simple project I planned to record in FOA or HOA, but the final
> render would be in simple quad (horizontal). So I don't need a lot of
> resolution. I enjoy recording with binaural microphones (the kind that
> looks like cheap earbuds), so I can record continuously without being
> noticed.
> >>
> >> So I wondered; is there a method to "convert" binaural to
> horizontal-only FOA? Apparently there is:
> >>
> >> https://www.ambisonic.net/quaduhj.html
> >>
> >> http://www.ambisonic.net/ambimix.html
> >>
> >> I guess my question is: what would be the software equivalent of a
> pan-rotate device?
> >>
> >> Marc
> > _______________________________________________
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