A mobile terminal, comprising: a touch screen; a sound output unit; a memory; and a controller configured to generate a sound by, receiving, via the touch screen, a writing input while a background screen is displayed on the touch screen; detecting a predetermined touching event that is generated on the touch screen for the writing input; reading, from the memory, a writing sound source based on the detected predetermined touching event; changing at least one property of the read writing sound source based on a property of the writing input applied to the touch screen; and outputting, via the sound output unit, sound corresponding to the writing sound source with said at least one changed property based on the type of the detected predetermined touching event, wherein at least one of a volume, a tone and a pitch of the read writing sound source is changed based on the property of the writing input; wherein the writing sound source is a sound source file that is a result of recording an effect sound that is generated when a writing input is performed in an actual analog environment; wherein changing the tone is performed by strengthening a sound in a low band in the writing sound source in response to an increase of the pressure of the touch to the touch screen, and by strengthening a sound in a mid band or in a high band in the read writing sound source in response to a decrease of the pressure of the touch applied to the touch screen; and wherein changing at least one property includes: changing the volume of the read writing sound source according to a pressure of the writing input applied to the touch screen in a case where the detected touching event is a touching-down event; changing the volume of the read writing sound source according to a speed at which the writing input is released from the touch screen in a case where the detected touching event is a touching-up event; and changing the tone of the read writing sound source according to the pressure of the writing input applied to the touch screen, and changing at least one of the pitch and the volume of the read writing sound source according to a moving speed of the writing input applied to the touch screen in a case where the detected touching event is a touching and moving event. a touch screen; a sound output unit; a memory; and a controller configured to generate a sound by, receiving, via the touch screen, a writing input while a background screen is displayed on the touch screen; detecting a predetermined touching event that is generated on the touch screen for the writing input; reading, from the memory, a writing sound source based on the detected predetermined touching event; changing at least one property of the read writing sound source based on a property of the writing input applied to the touch screen; and outputting, via the sound output unit, sound corresponding to the writing sound source with said at least one changed property based on the type of the detected predetermined touching event, receiving, via the touch screen, a writing input while a background screen is displayed on the touch screen; detecting a predetermined touching event that is generated on the touch screen for the writing input; reading, from the memory, a writing sound source based on the detected predetermined touching event; changing at least one property of the read writing sound source based on a property of the writing input applied to the touch screen; and outputting, via the sound output unit, sound corresponding to the writing sound source with said at least one changed property based on the type of the detected predetermined touching event, changing the volume of the read writing sound source according to a pressure of the writing input applied to the touch screen in a case where the detected touching event is a touching-down event; changing the volume of the read writing sound source according to a speed at which the writing input is released from the touch screen in a case where the detected touching event is a touching-up event; and changing the tone of the read writing sound source according to the pressure of the writing input applied to the touch screen, and changing at least one of the pitch and the volume of the read writing sound source according to a moving speed of the writing input applied to the touch screen in a case where the detected touching event is a touching and moving event.