Built-in laptop mic not working

/etc/modprobe.d/alsa-base.conf didn’t exist, I created the file and added the line

options snd-hda-intel dmic_detect=0

Then I ran

pulseaudio -k && sudo alsa force-reload

and Pulse Audio reloaded, but the alsa command could not be found.

My terminal output:

sudo: alsa: command not found