PC-LM1E Camera very bad sound in MAC

I purchased a PC-LME1E camera for a Mac Mini I5 with 32GB RAM MacOs = Catalina. Camera has been configured pquickly, but micro sound is very very bad. People says that can’t hear me properly. Is like I was far away.
I have tried to adjust micro settings, but I can not improve it.
Could you tell me how can I solve this issue ?