I bought my Behringer ECM8000 about 5 years ago to be able to calibrate / measure my home soundsystem but never did.
Yesterday I finally had everything set up to have a use for the microphone, room EQ wizard and brutefir, connecting it to my Edirol FA-101 with 48v phantom power using XLR connectors + a loopback to calibrate the soundcard. Somehow, and I really tried everything I could think of, the volume is very low even if I turn the sensitivity to max as far that noise starts to appear.
When I shout very close into the microphone it registers, but 1 meter is already too far for it to register anything.
On the PC I tried WMS, ASIO on Windows and Jackd on Linux, but even the VU meter on the soundcard shows little.
Any ideas?
Yesterday I finally had everything set up to have a use for the microphone, room EQ wizard and brutefir, connecting it to my Edirol FA-101 with 48v phantom power using XLR connectors + a loopback to calibrate the soundcard. Somehow, and I really tried everything I could think of, the volume is very low even if I turn the sensitivity to max as far that noise starts to appear.
When I shout very close into the microphone it registers, but 1 meter is already too far for it to register anything.
On the PC I tried WMS, ASIO on Windows and Jackd on Linux, but even the VU meter on the soundcard shows little.
Any ideas?
For some reason when I googled sensitivity of this mic I get results ranging from -40dB to -60 or -70dB
Mics meant for next-to-the-mouth use have -60dB sensitivity. You need around -40dB to measure anything from a distance or the noise from the electronics will swamp everything.
Mics meant for next-to-the-mouth use have -60dB sensitivity. You need around -40dB to measure anything from a distance or the noise from the electronics will swamp everything.
The ECM8000 is the industry standard for feedback destroying and echo detection in PA system. It is used with the Sabene Workstation to determine the delay requirement in a hall.
It must be fed into a balanced mic preamp to bring the output up to a usable level and if into a PC sound card that will be expecting a few hundred millivolts or so, without a mixing desk to bring the level up, will not work well at all at a few milivots.
It must be fed into a balanced mic preamp to bring the output up to a usable level and if into a PC sound card that will be expecting a few hundred millivolts or so, without a mixing desk to bring the level up, will not work well at all at a few milivots.
You can see the microphone XLR sockets in the following image:
https://static.roland.com/assets/images/products/gallery/fa_101_angle_gal.jpg
The soundcard connects to the PC by FireWire and I enabled the 48v phantom power.
The cable is about 5 meter, could that cause the voltage to drop by that much? Will measure the voltage when I am back home and report back.
Intel Desktop PC, Windows 10, Gentoo Linux. Dawicontrol DC-FW800 PCIe FW card. FA-101 powered by its own adapter and connected to the FW card.
I use an ECM8000 with a 10m mic cable. My speakers are 6.5m from the listening position and I have no problems with using this mic for measurements. I can confidently say your cable length isn't an issue.
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