#define CMD_null 0x0000 /* post status */
#define CMD_control 0x1000 /* hard control command */
#define CTRL_mask 0x0F00 /* mask off control nibble */
-#define CTRL_data 0x00FF /* madk to get data byte */
+#define CTRL_data 0x00FF /* mask to get data byte */
#define CTRL_null 0x0000 /* null control */
#define CTRL_vol_up 0x0100 /* increase volume */
#define CTRL_vol_down 0x0200 /* decrease volume */