No sound with rt5640

Hi, I installed ParrotSec on my acer aspire switch 10e (it was a lot of tries since I found an article saying that in some cases the grubia32.efi had to be Microsoft/Boot/bootmgfw.efi or efi won’t boot)
Now the system is ALMOST operational:
I have no sound !

The card does appear (it is a bytcr-rt5640) in sound preference under the hardware panel.

Parrot OS 4.11
kernel 5.10.0-6parrot1-amd64

I did some googling an it appears your sound card has issues with Linux. Have you tried running

alsamixer

https://forums.linuxmint.com/viewtopic.php?f=48&t=286656

Hi, read many articles untill finding this one, it give the solution.
For a summary please go there.
And don’t forget to install firmware-intel-sound.