Sound not working after a freeze and hard reboot

[Someone]

My sound has abruptly stopped working several times in the past, and at
some point somebody on here suggested I try running the command "alsactl
init", which fixed the issue both presently and for each subsequent
sound breakage. However, this time it isn't working. I've confirmed that
none of the sliders are at 0 in `alsamixer`.

Anyone have ideas about what I could do to fix the problem?

Thanks.