ubuntu@ubuntu-Inspiron-5590:~$ amixer cget numid=37
numid=37,iface=CARD,name='HDMI/DP, pcm=11 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
ubuntu@ubuntu-Inspiron-5590:~$
ubuntu@ubuntu-Inspiron-5590:~$
ubuntu@ubuntu-Inspiron-5590:~$ amixer cget numid=37
numid=37,iface=CARD,name='HDMI/DP, pcm=11 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
ubuntu@ubuntu-Inspiron-5590:~$