INTEGRATED AND DIFFERENTIATED WAVEFORM GENERATOR FOR ELECTRONIC MUSICAL INSTRUMENT

摘要

A keyboard operated electronic musical instrument is disclosed which has a number of tone generators that are assigned to actuated keyswitches. Musical tones are produced by computing a master data set which defines the data points for a period of the musical waveshape. The computation uses a preselected set of harmonic coefficients. Provision is made for altering the harmonic coefficients to produce waveshapes which are derivatives or integrals of the basic waveshape. The order of differentiation or integration can be varied to produce time variant tone effects.