| 摘要 |
PURPOSE:To inexpensively obtain a sound controlling electronic instrument having a high SN ratio and reducing the dispersion of performance by adding the nuance of human voice to the harmonic component of a instrument sound by a digital filter processing based on the time division processing of software by a digital signal processing means. CONSTITUTION:A musical tone sounding circuit 31 forms a musical tone in accordance with playing information and an A/D converter 38 converts an analog voice signal into a digital voice signal. Each envelope signal is extracted from each sound signal whose band is restricted by digital filtering processing, each musical tone signal whose band is restricted by the digital filtering processing is modulated by each envelop signal, respective modulation signals are accumulated and outputted as a digital output musical tone signal, and the respective processing processes are successively executed with a prescribed processing interval by time division digital signal processing. Consequently, the sound controlling electronic instrument having a compact circuit size, improved SN ratio and reduced performance dispersion can be obtained. |
