Patent ID: 7381885

Claim:
An electronic percussion instrument comprising: a waveform data storage device that stores waveform data of percussion tones to be output for roll performance and waveform data of percussion tones to be output for non-roll performance; a performance operator that has a percussion surface; a percussion pattern-detecting device that detects a pattern of percussion applied to the percussion surface of said performance operator, and outputs a value of a parameter indicative of the detected pattern of percussion; a parameter storage device that stores values of the parameter; a storage control device that causes values of the parameter output from said percussion pattern-detecting device to be sequentially stored in said parameter storage device in an order of output; a waveform data-determining device that is operable when a new value of the parameter is stored in said parameter storage device, to determine one of the two waveform data stored in said waveform data storage device according to at least two values of the parameter stored before the new value of the parameter was stored and the new value of the parameter; and a musical tone signal output device that reads out the determined waveform data from said waveform data storage device, and outputs a musical tone signal generated based on the read-out waveform data.