Patent ID: 7595443
Filing Date: 2009-09-29
Classification: G09B,G10H

Abstract:
1. A music practice supporting appliance that receives an input of a musical sound of a musical instrument and displays a deviation of one of a pitch and a sound volume of the inputted musical sound with respect to one of a pitch and a sound volume of a preset reference sound, the music practice supporting appliance comprising: a signal input unit that receives the input of the musical sound, converts the inputted musical sound into an electric signal, and outputs the electric signal as an input signal; an input signal amplifying unit that amplifies the input signal inputted through the signal input unit; a waveform processing unit that converts the amplified input signal into a rectangular wave and outputs the converted amplified input signal as input signal data; a timer unit that outputs a timing signal used to store the input signal data; a first data memory unit that stores the input signal data in accordance with the timing signal; a second data memory unit that stores input signal data stored in the first data memory unit when the input signal data stored in the first data memory unit exceeds a preselected storage capacity of the first data memory unit; a control unit that controls the first data memory unit and the second data memory unit so that while the first data memory unit is receiving for storage new input signal data which exceeds the preselected storage capacity of the first data memory unit, portions of input signal data previously stored in the first data memory unit are deleted from the first data memory unit and are stored in the second data memory unit, and the new input signal data is stored in the first data memory unit; a display unit that displays the input signal data stored in the first data memory unit and the second data memory unit; a display information switching unit that selects one of the input signal data stored in the first data memory unit and the input signal data stored in the second data memory unit to be displayed by the display unit; and a display data memory unit that stores display data to be displayed by the display unit in accordance with a selection by the display information switching unit.