I was using my Steinberg UR22-MKII, MXL 990 setup for 4-5 months without any problems. But today, suddenly when the mic was connected (and working), the mic suddenly stopped giving output. I couldn't find the problem. Here are my findings.
- There is a ground noise (humming) when holding the microphone in my hand and if I touch another metal object, the humming stops. But mic still doesn't work. I also feel a small electric shock in my finger when I do this.
- I also have a dynamic behringer mic, which still works with the same audio interface.
- I tried different USB ports (that power the interface), and different computers, same results.
- I tried unplugging the computer for possible grounding issues. Same result with battery power.
- Touching the audio interface while holding the microphone also erases the ground noise within the interface, which is the noise, independent from the microphone (inherent noise).
I don't have another condenser mic or another audio interface to figure out which one is faulty. Dynamic mic working fine, suggests that the mxl 990 can be broken, but the problem can also be in the phantom power mode of the audio interface, which the dynamic mic doesn't make use of.
I want to find out which one is faulty, so I know which one to replace. I don't want to order a new expensive microphone (yes mxl 990's are also expensive in my country), only to find out that the audio interface was the faulty one.
I am open for any suggestions, thank you for your time.
Edit1: I did the tests, the answer suggested. When the interface is connected to the computer, the 1-2 and 1-3 ports give 47.8V as suggested. But when the cable is connected and the tests are done at the end of the cable, I read 0.02V or 0 V, this means that the cable is faulty. But then how can the dynamic mic work with the same cable ?
Answer: Turns out faulty wire. Somehow one of the cables was disconnected from its base inside the cable adapter. Fixed after soldering.