It may happen that you have accidentally type little text in small letters which you wanted actually in CAPS or vice versa. Generally I see the wrong thing mistake when I have completed the sentence in other case.
Present in the guide we have tutorial on how to turn toggle keys on as when the Caps, Scroll and Num Lock Keys are hit the sound is played. So if your audio is ON, then it’s your confirmation.
Turn on Beeps after Hitting a Lock Key