essentials/dotfiles/awesome/lain/wiki/alsa.md

<- widgets

Shows and controls alsa volume with a textbox.

volumewidget = lain.widgets.alsa()

input table

Variable	Meaning	Type	Default
timeout	Refresh timeout seconds	int	5
command	Alsa mixer command	string	"amixer"
channel	Mixer channel	string	"Master"
settings	User settings	function	empty function

command is useful if you need to pass additional arguments to amixer. For instance, users with multiple sound cards may define command = "amixer -c X" in order to set amixer with card X.

settings can use the following variables:

Variable	Meaning	Type	Values
volume_now.level	Volume level	int	0-100
volume_now.status	Device status	string	"on", "off"

output table

Variable	Meaning	Type
widget	The widget	wibox.widget.textbox
channel	Alsa channel	string
update	Update widget	function

You can control the widget with key bindings like these:

    -- ALSA volume control
    awful.key({ altkey }, "Up",
        function ()
            os.execute(string.format("amixer set %s 1%%+", volumewidget.channel))
            volumewidget.update()
        end),
    awful.key({ altkey }, "Down",
        function ()
            os.execute(string.format("amixer set %s 1%%-", volumewidget.channel))
            volumewidget.update()
        end),
    awful.key({ altkey }, "m",
        function ()
            os.execute(string.format("amixer set %s toggle", volumewidget.channel))
            volumewidget.update()
        end),
    awful.key({ altkey, "Control" }, "m",
        function ()
            os.execute(string.format("amixer set %s 100%%", volumewidget.channel))
            volumewidget.update()
        end),

where altkey = "Mod1".