Only four Core Sound OctoMic second-order microphones are needed
replace the 12 mono microphones used in full sphere ORTF-3D, with
better polar patterns and true ORTF angles & spacings for all pairs
of mics.
Why “12 mono microphones”?
ORTF-3D needs 8 capsules pointing to the corners to a cube.
Right?
Best,
Stefan Schreiber
----- Mensagem de moskowitz <lenmoskow...@optonline.net> ---------
Data: Wed, 21 Oct 2020 12:12:44 -0400 (EDT)
De: moskowitz <lenmoskow...@optonline.net>
Assunto: [Sursound] ORTF-3D With Higher-order Ambisonics
Para: sursound@music.vt.edu, sursound-requ...@music.vt.edu
Steven Boardman <boardroomout...@gmail.com>
wrote:
For even better polar pattern control, you could use ambisonic mics in an
ORTF.
Schoeps won?t have better polar patterns than a well calibrated ambisonic
mic. So in theory the ORTF array would produce a better spatial image.
If you have enough channels and your budget is good, why not use 8
ambisonic mics?
Or if you used something like Harpex, maybe you could synthesise spaced
pairs and only use 4?
You would still be below Schoeps ORTF budget as well?.:)
Only four Core Sound OctoMic second-order microphones are needed
replace the 12 mono microphones used in full sphere ORTF-3D, with
better polar patterns and true ORTF angles & spacings for all pairs
of mics.
You'd need 32 recording channels. That can be done at reasonable
cost with a Midas 32C/DL32 setup (for under $3000), four Zoom F8ns,
or for higher cost with two Sound Devices Scorpios.
We tried using Harpex to do ORTF with a single OctoMic.
Unfortunately, its plane wave decomposition process for translating
ambisonic soundfields in space results in relatively weak location
cues.
Len Moskowitz (mosko...@core-sound.com)
Core Sound LLC
www.core-sound.com
Home of OctoMic and TetraMic
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