If you don't run the GUI the console is the command line
If you run the GUI it's hidden behind that, CTRL+ALT+F1 gets a console, CTRL+ALT+F7 gets the GUI back
Or you can use the LXTerminal program by clicking its icon. Then run sudo alsamixer.
Note: Having anything humorous in your signature is completely banned on this forum. Wear a tin-foil hat and you'll get a ban.
Any DMs sent on Twitter will be answered next month.
This is a doctor free zone.