Yes, you are right : It is a wrong command.
ALSACTL STORE : But lower case, will work
Always please copy / paste a text to an editor
with different types, if any chance, it can be
misread / misspelled.
And of course no reason to type a full command :
Type alsact<TAB> : Bash completion will fill out
the missing letter(s).
( als<TAB> will show like six alsa commands.)
Alternatively copy / paste the complete command
to the command line.