* get list of alsa soundcards: ''cat /proc/asound/cards''
  * restart alsa: ''pulseaudio -k && sudo alsa force-reload''
  * get a list of soundcards: ''aplay -l''
  * blacklist a soundcard:
    * get the driver name: ''cat /proc/asound/modules''
    * inside ''/etc/modprobe.d'' create a file with extension ''.conf'' with the line ''blacklist'' then the driver name
      * example: ''blacklist snd_hda_intel''
  * you can change the order of sound cards in ''/etc/modprobe.d/alsa-base'' (as of ubuntu 22.04)
    * this did not change the order of a USB sound card vs. built-in sound :-?