The hum noise you experienced before fix your mic was the same as the mp3 samples posted by others members (below)?
Have you checked if now there’s absolutely no type of low hum, even being much lower than before?
The hum noise you experienced before fix your mic was the same as the mp3 samples posted by others members (below)?
Have you checked if now there’s absolutely no type of low hum, even being much lower than before?