Sound System

Alsa install

$ sudo pacman -S alsa-utils alsa-plugins alsa-lib pulseaudio-alsa
$ sudo pacman -S pavucontrol pulseaudio

Open sound manager

$ alsamixer

Toggle mute

$ amixer -q set Master toggle

Volume Down

$ amixer -q set PCM 2- unmute

Volume Up

amixer -q set PCM 2+ unmut