A method for processing a digital signal produced by digitizing an analog signal such as a musical instrument sound signal, and an apparatus for producing sound source data. When the input signal contains a periodically repetitive wave form portion, the fundamental frequency and its high harmonic components...http://www.google.es/patents/US5519166?utm_source=gb-gplus-sharePatente US5519166 - Signal processing method and sound source data forming apparatus
Signal processing method and sound source data forming apparatus
