Originally Posted by
toddalin
I finally got the RTA to work with the ECM8000 mic..., but:
Even when the amp volume is turned all the way down (no sound from the speakers), the display still dances about (fairly evenly across the band now except for my 60 hz bump, probably due to the unshielded mic cable).
I know the mic is working because the display does go up with a signal from the mic. (While the Max adjustment brings the level down, it's still there.)
Again, is this normal? Is it reading its own background noise?