Hi all,
I've been lurking, getting ready to jump back in after years away from tapin'. More mundane questions to come from me be sure, but I'm wondering if anyone here has heard of or had any experience with a MPT (Matrixed Pressure Triplet) micing setup? Seems to be a baffled omni array of three capsules arranged at equal 120deg. intervals around a cylinder or sphere. Center capsule points forwards at 0deg or 12 o'clock, left capsule at 120 deg or 8 o'clock, right capsule at 240deg or 4 o'clock. Matrix as follows: Center signal is split evenly L-R, Left signal is split between L and mixed 18db down with phase reversed to the R channel, Right is opposite of Left (routed to R and 18db down with phase inverted to L).
Seems like sort of the bastard love child of a M/S setup and sphere bafflled omnis.
I found a cello recording through Amazon done this way but can't find the link & turned up a couple AES papers but I'm hesitant to drop $20 to download the PDF (latest one)
http://www.aes.org/e-lib/browse.cfm?elib=5560 which seems to describe something like that Holophone egg-shaped 5.1 mic
http://www.holophone.com/home.htmlI noticed in one of
Moke's posts (edit- make that spcyrfc, Moke was explaining building the J-disc) in an old thread on spaced omni's vs. Jecklin disc
http://taperssection.com/index.php?topic=800.105 he was building DIY Jecklin discs & mentioned the possibility of a tri-disc setup with three mics that might be used for micing a circle of musicians (Reply #106). Got me thinking again.. and imagining three mini-omni caps in a headband for manipulating a stealth HTRF rig after the fact like a M/S mixdown..
Maybe just a load of %$*, forgive me if I'm overstepping my newmember status, curious for your thoughts though.