dwm volume control

dwmconfig.h

/**
 * config.h 
 * ALT + F11 | F12 
 */

static const char *upvol[]   = { "amixer", "set", "Master", "3+",     NULL };
static const char *downvol[] = { "amixer", "set", "Master", "3-",     NULL };
static const char *mutevol[] = { "amixer", "set", "Master", "toggle", NULL };

static Key keys[] = {
	{ MODKEY,                       XK_F12,    spawn,          {.v = upvol   } },
	{ MODKEY,                       XK_F11,    spawn,          {.v = downvol } },
	{ MODKEY,                       XK_F9,     spawn,          {.v = mutevol } },
};

If anyone's wondering why the vol up and down aren't working for them, just use sudo amixer in place of amixer

for people that use pamixer instead of amixer

 static const char *upvol[]   = { "pamixer", "--increase", "3", NULL };
 static const char *downvol[] = { "pamixer", "--decrease", "3", NULL };
 static const char *mutevol[] = { "pamixer", "-t",              NULL };