My recording setup is suddenly having an issue with microphone hiss. This hiss is overpowering in every recording that I do, and it shows up even when I set the gain to zero and turn phantom power off at the audio interface.
When the phantom power is on, but the gain is set to zero, this hiss is accompanied by my mic audio being extremely hot—even the smallest of sounds causes the audio to peak.
When the phantom power is off, my mic does not pick up any audio that I make, but the hiss is still present and gets recorded by my DAW. The hiss does not produce a constant frequency. It fluctuates up and down like TV static.
I have tried directly monitoring the audio via the audio interface, and the hiss doesn't seem present unless I increase my output volume to near-max, and even then, the hiss is pretty quiet.
I have tried turning on padding and enabling the low-cut on my mic to see if these were causing the issue, but neither stopped the hiss or prevented the hot audio.
I have tried using both Reaper and Audacity. The hiss and hot audio occur in both.
I have tried unplugging my audio interface and plugging it back in. I have also tried to find more updated drivers for my audio interface, but none were available.
I'm using an AT-2020 for the microphone, a UMC22 for the audio-interface, and a simple XLR cable to connect the two. My structure is as follows:
AT-2020 -> XLR Cable -> UMC22 Audio Interface -> USB -> PC
Given that the hiss occurs even when the microphone has no phantom power and since it occurs in multiple DAWs, I think the audio interface might have been broken somehow. What do y'all think?