~/.config/awesome: Control audio using X media keys.

.config/awesome/rc.lua

    awful.key({ modkey }, "l", function() os.execute(os.getenv('HOME') .. "/.bin/xkbswap") end),
    awful.key({ modkey, "Shift" }, "l", function() os.execute("xlock -mode blank") end),
    awful.key({ modkey }, "b", function() awful.util.spawn("chromium --allow-file-access-from-files", false) end),
    awful.key({ modkey, "Shift" }, "b", function() awful.util.spawn("chromium --incognito --allow-file-access-from-files", false) end)
    awful.key({ modkey, "Shift" }, "b", function() awful.util.spawn("chromium --incognito --allow-file-access-from-files", false) end),
	 awful.key({ }, "XF86AudioMute", function() os.execute("amixer set Master toggle") end),
    awful.key({ }, "XF86AudioLowerVolume", function() os.execute("amixer set Master 5%-") end),
    awful.key({ }, "XF86AudioRaiseVolume", function() os.execute("amixer set Master 5%+") end)
)
clientkeys = awful.util.table.join(