I have a new Rode PodMic (or Procaster) plugged into a Behringer U-Phoria UMC204HD and I experienced a very weird hum problem. If I place the mic on different locations / angles, a very weird hum appears. See the following (professional ;)) drawing to better see what I mean.
I turned the gain all the way up for this example and boosted the output a little bit to make it more noticeable. But it's also hearable on lower settings. I have two recordings attached with the mic pointing to the top and pointing away from me (ignore the birds :)). I turned off the fuse for the complete house / room and just recorded this with a MacBook Pro (running on battery) and just the Interface to eliminate other EMIs.
So my question to you audio experts: What's the cause of this weird hum and how can it be handled?
Thank you very much and have a great day
EDIT: Tested with a Rode Procaster - same hum on different orientations, so I updated the thread – it's not a PodMic Issue, it's a general dynamic microphone issue.