How to remove noise from omnidirectional mode?

Question

Microphones

I bought a Zet Coradji microphone, the most adequate one available to us, it has 2 modes: cardioid and omnidirectional, in variant 1 the sound is written everything is fine, I put it on omnidirectional, and it sounds a lot, oddly enough at the time of writing the question it worked fine, what could it be the case?

Answer 1

Microphone sensitivity - check that it is: "manually".