Hi Brian,
I got excited at the prospect of taking an Ambisonics mic into the field to
do the kind of 'anthropogenic'-centric soundscape recording I've done lots
of using near-binaural mics (and some Blumlein and M/S and spaced omni).
The tantalizing prospect was to take composed immersive sound to the next
level, allowing and playing with, as you say, listener head
position=96especially since platforms like YouTube and Facebook support
headset decode and have some rudimentary HRTF synthesis...
....long story short, my enthusiasm cooled significantly when I played with
live-decode from recordings made with second-generation tetrahedral
ambisonics, because for people used to 'rich' stereo with a lot of subtle
cues for e.g. depth and focused localization, the stereo image produced
felt very vague and flat=96more like an uneven flat sphere than a three
dimensional space, as it were.
>From what I understand higher-order Ambisonics fills in the 'holes' and
gives more, but IMO what's going to be really necessary for the technique
to work as I want is to somehow capture, and be able to "remove in post"
the timing and maybe to some extent frequency variation characteristic of
HRTF, and synthesize more accurately those differences for the
realtime-rendered head position.
I have vague ideas of how one might in theory attempt this, there should be
enough information in a tetrahedral array=96and there should be ways of e.g=
.
using a nested double tetrahedral array at controlled spacing, maybe with
the inner set serving as an occluding baffle...
....but that would require a lot of computation if it worked at all...
....and I'm too lazy personally to take it on. So far.
But absent some kind of next-generation step up, I am myself waiting for
more to be there before jumping... :/
aaron
On Thu, Sep 27, 2018 at 1:59 PM 'Brian Valente'
[naturerecordists] <> wrote:
>
>
> Hi all,
>
>
>
> Is anyone experimenting or working with ambisonic audio?
>
>
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> I see new VR microphones out there, Zoom just released a 360 mic for
> around $350
>
>
>
> I=92ve always been a fan of and recorded ambient, but I really love the i=
dea
> of putting on headphones and as the you move your head, the audio moves
> accordingly so it=92s as though you were really there
>
>
>
>
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> I just haven=92t seen much in the way of standalone ambisonic audio or
> headphones for that purposes.
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> Thanks
>
>
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> Brian
>
>
>
> portfolio https://www.brianvalentephotography.com/
>
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>
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