Patent ID: 6426456
Filing Date: 2002-07-30
Classification: G10H,Y10S

Abstract:
A method of generating a percussive sound in a device, the device having a memory, the method comprising:providing in the memory a percussive sound file corresponding to a desired percussive sound, the percussive sound file having a noise shape filter, a Doppler shift profile, a time wave shaping profile, and a harmonic content profile; generating a white noise signal; filtering the white noise signal with respect to frequency according to the noise shape filter to provide a shaped white noise signal; generating a frequency modulated signal according to the harmonic content profile, the frequency modulated signal having a base frequency; adjusting the base frequency of the frequency modulated signal according to the Doppler shift profile with respect to time; summing the shaped white noise signal and the frequency modulated signal to provide a summed signal, the summed signal having a magnitude; shaping the magnitude of the summed signal with respect to time according to the time wave shaping profile to provide a shaped summed signal; and providing the shaped summed signal to an audio circuit whereby the shaped summed signal is converted into an acoustical signal corresponding to the desired percussive sound.