How to enable a disabled sound card?

A year ago, I disabled the internal sound card in order to only allow my bluetooth headset.

Now, I have changed my mind, but I have searched and searched, and I cannot find how I did it so that I can revert it. The only thing I remember is that it was a terminal command.

So how do I find the disabled sound card and enable it?

I might add that the command I ran made the sound card disappear completely from sound settings.

I tried running pactl list cards but I only found my bluetooth headset there.

I also ran ls /dev/snd/by-id but same result as above. Only my headset.

Found a solution.

I edited /etc/modprobe.d/blacklist.conf and commented out blacklist snd_hda_intel and rebooted.

To help people troubleshoot these things, what I did was a history | grep snd and I found something like this:

➜  ~ history | grep snd                        
 1727  lsmod | grep snd
 1728  lsmod | grep snd_hda
 9479  lsmod | grep snd

So then I did history | head -n 1800 | tail -n 100 and looked what I did around that, and then I found this:

1723  sudo apt install pavucontrol
 1724  lsmod
 1725  lsmod | grep mic
 1726  lsmod | grep input
 1727  lsmod | grep snd
 1728  lsmod | grep snd_hda
 1729  cd /etc/modprobe.d
 1730  ls
 1731  cat blacklist-ath_pci.conf
 1732  vim blacklist.conf
 1733  sudo vim blacklist
 1734  sudo vim blacklist.conf

So I have obviously edited the blacklist file in the process of disabling the sound card.