Ok, here I am again as I promised. the problem: when I try to make a recording in my laptop (integrated mic), I am able to hear myself (when I reproduce it afterwards) but with a lot of noise. I read a solution of going to alsamixer and disabling "L-R" in capture, but when I do that,I am not able to hear anything. Any suggestions? Thx!

Another thing (I don't know if that has to do with it) is that when I go to volume control->recording, every time I see a small red "x" in every mic (microphone, capture, internal mic) and if I enable them, close and reopen volume control the same "x"s appear.

Try running alsactl store after changing your alsa settings.

I don't like using integrated microphones; I prefer a plugin headset for recording. Integrated mikes will pick all kinds of background noise and even feedback.

The noise is not just a background, it is a very annoying one and it is not a hardware issue, because in windows it works perfect. I'll try the external mic as well, but I don't think that this is the cause of the problem.

I think I found a solution. This was to disable from alsamixer Dock Mic, Internal Mic and Mic and have enabled (but not 100%) Capture and Digital.

Thx!