I trust you are familiar with Ambisonics... e.g. the Soundfield, Ambeo,
Tetramic, Brahma mics which record second order Ambisonics with a four
element array which can be transcoded into a stereo image in post with any
perspective...
In theory. In practice higher-order Ambisonics is really needed IMO to get
imaging in arbitrary directions - and the results are always coincident,
which is you like spaced array stere sounds fairly flat...
aaron
On Wed, Jun 14, 2017 at 5:03 PM [naturerecordists] <
> wrote:
>
>
> Has anyone ever used a spherical quad microphone array for field recordin=
g?
>
> The layout I'm thinking of would look somewhat like a hybrid between an
> IRT Cross (four cardioids, pointing outward, placed in a square roughly
> 0.25m on a side) and a Schoeps KFM 6 sphere microphone (a vaguely
> head-sized sphere with two omni capsules flush-mounted 180 degrees apart)=
.
> Basically take the KFM 6 sphere and add two more microphones so they're
> spaced evenly every 90 degrees around the periphery.
>
> My main interest in this isn't so much doing surround recording (though
> that should be possible), it's that I've had some otherwise excellent
> drop-and-recover sessions marred somewhat because an interesting sound
> field winds up being biased to one side because of how the wildlife settl=
es
> down around the gear. My hope with the spherical microphone is that the
> stereo mix could be "steered" through careful summing and differencing
> after the fact to re-orient the sound field for the listener.
>
> Right now my go-to microphone array is an EM-172 SASS. I've got eight mor=
e
> capsules in matched sets of four, ready to be built into... something. I
> was originally planning to build them into a pair of foam SASS arrays, bu=
t
> I'm more than happy building four of them into a spherical microphone lik=
e
> the one I described.
>
> But in all the searching I've done, I haven't found any examples of anyon=
e
> trying this. It seems too obvious to have been overlooked, so I'm guessin=
g
> there's some technical fly in the ointment I'm missing. Any ideas? If thi=
s
> idea has already been tried and abandoned, I'd just as soon not go throug=
h
> the hassle. If it hasn't been tried, full steam ahead!
>
> Thanks,
>
> Tom
>
>
>
>
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