At 14:44 26/06/2017, Steven Boardman wrote: >I use the Motu 4pre (with a tablet for on the fly decodes), with a >Zoom F8 in the field. I also have a RME Fireface in the studio. >None have problems with the noise floor being louder than that of the mic. >The noise of the Tetramic is only a problem when the subject is quiet >or far away. So for most musical applications itâs great. If you are >trying to capture wildlife at a distance then there are better options
Quite so. As I read the article, I didnt have the impression that the sources used were all that challenging in terms of loudness. The noise and sensitivity spec on the Tetramic is quite satisfactory:
"... Self noise: 19 dBA per capsule. Self noise can decrease or increase depending on selected decode
"Maximum SPL per capsule: 135 dB Sensitivity per capsule: 7.0 mV/Pa nominal (-43 dB ref: 1V/Pa) ..."
I cannot find comparably detailed specifications for the MOTU 4Pre, but the sensitivity demands above are not extreme.
At 14:17 26/06/2017, Sampo Syreeni wrote:
It's been something like a decade since I looked into something like Cirrus Logic or Analog Devices A/D silicon. Then a perfectly good four channel, 16-18 bit equivalent chip cost somewhere in the vicinity of $35. A reference PCB layout for it came free as well. Thus, the idea that you'd now have to expend anything beyond some 100's in hardware in order to get a fully functional, top of the line preamp for your top of the line ambisonic mic, seems pretty much preposterous.
Indeed so. I cant quote prices for the A/D stage, but the one-off price of a THAT1512 analog input amplifier costs only EUR 6.82 at Mouser.com, and requires only a few additional components.
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