| 摘要 |
PURPOSE:To produce sounds having lingering tones by forming a musical note length in accordance with stored melody information and, at the same time, designating the musical interval of a sound source and inputting stored data, such as waveform data of sounds, envelope waveform data to a loudspeaker. CONSTITUTION:An oscillation circuit 1 oscillates an aimed frequency and inputs the frequency to sound sources 1, 2, and 3 and a rhythmic sound production circuit 6. A control circuit 2 divides the oscillation frequency into frequencies of tempo (rhythm) and data (not length, jump data, intervals of each sound source, data of sound quantities of and punctuations of each sound source and rhythm) are stored in a built-in main ROM at every note of all pieces of music. The sound sources 1-3 store square waves, sine waves, and saw tooth waves in the their waveform ROMs and can produce various tone qualities by storing waveforms and envelopes of each musical instrument and in their envelope ROMs. Since this sound producer is provided with plural sound sources having different tone qualities, expandable, substantial, and natural performances can be realized with this sound producer when rhythmic sounds are added. |
