#!/bin/bash
volsetting=`amixer sget 'PCM' | grep off`
    case "$1" in
    mute)
        amixer sset 'PCM' mute
    ;;
    unmute)
        amixer sset 'PCM' unmute
    ;;
    toggle)
        if [[ x"$volsetting" = x"" ]]; then
            amixer sset 'PCM' mute
        else
            amixer sset 'PCM' unmute
        fi
    ;;
    increase)
        amixer sset 'PCM' 8%+
    ;;
    decrease)
        amixer sset 'PCM' 8%-
    ;;
    *)
        echo "This is not an acceptable command!";
        echo -e "Use \033[01;33mmute\033[01;00;0m, \033[01;33mincrease\033[01;00;0m or \033[01;33mdecrease\033[01;00;0m as options!";
        echo;
    esac