How to remove microphone crackle in Linux Mint?

Question

linux

There is a problem. Dexp 0115 laptop.
Inside the Intel Celeron N2800, some sound from the same Intel.
It costs Linux Mint 17.2, yesterday it upgraded to 17.3 (the problem described below in both cases) The
microphone began to work badly. In all programs. I checked it through audacity - there are peaks in the place of the voice - crackling. I dug into the settings (system ones, set pavucontrol as well) like everything is fine.
Started with LiveCD and Ubuntu and Mint - works fine.
Can it be fixed? I don’t want to demolish the system
UPD1: there is no sound from the microphone in Skype at all
UPD2: reinstalled Mint. I found that in the PulseAudio settings (via pavucontrol) there is one device in the input devices (Embedded audio), but it has two ports: "Built-in microphone" and "Microphone (unplugged)". If you choose the second, then everything works. But after closing the pavucontrol window, the port is reset to the first one.
Found this solution:

In the file /etc/pulse/client.conf find the line:
: autospawn = no
Change it to:
autospawn = yes Uncomment
the line there:
; daemon-binary = /usr/bin/pulseaudio change
to:
daemon-binary = /usr/bin/pulseaudio
Save file.
In /etc/pulse/daemon.conf find the line:
: daemonize = no
change it to:
daemonize = yes
Save the file.
Restart pulseaudio: (as user)
pulseaudio -k && pulseaudio --start

After that, it does not reset the setting if you close pavucontrol. But it resets after a reboot =(
UPD3 - everything works fine on Windows

Answer 1

Do you really think that the problem is in the system, and not in the microphone?

Answer 2

UPD: there is no sound from the microphone in skype at all

And sometimes you need to adjust the microphone in Skype ... like here: Skype and microphones .
Along the way, other problems with the microphone can become understandable.
Check with which kernel module (driver) your audio card is supported in the LiveCD boot and in the installed system (are they the same?). Sometimes for new and close models, the wrong module is installed.